Every campaign manager eventually hears the same question from a volunteer: “What am I supposed to say at the door?” The honest answer depends on which phase of the race you are in — and on what you need from that specific turf.
Two modes dominate political door knocking: ID canvassing (identification) and persuasion canvassing. They look similar from the sidewalk. At the door, they are completely different conversations with different goals, different scripts, and different success metrics.
Mix them up and you waste doors. Run ID too late and you miss your chance to move undecided voters. Run persuasion during GOTV week and you annoy supporters who just need a ride to the polls.
This guide explains the difference, when to use each, what to log in your field app, and how to read the numbers after a shift.
ID canvassing (sometimes called “support ID” or “voter ID” — not to be confused with voter ID laws) is a short conversation whose sole job is to learn where someone stands. You are not trying to change their mind. You are trying to sort the list.
A typical ID knock takes 30 to 90 seconds. You introduce yourself, name the candidate or issue, ask a direct support question, record the answer, thank them, and move on.
Standard support levels:
Some campaigns collapse this to a simpler scale (Support / Undecided / Oppose). The important part is consistency: every volunteer logs the same codes so your data is usable.
Volunteer: Hi, I’m Alex with the Rivera for City Council campaign. We’re talking to neighbors about the election on November 3rd. Have you heard of Maria Rivera?
Voter: A little bit.
Volunteer: Maria is a local teacher running to fix the potholes on Main Street and keep property taxes stable. If the election were today, would you say you’re planning to support her, leaning against her, or still undecided?
Voter: I’m probably going to vote for her.
Volunteer: That’s great — thank you. We’ll follow up closer to Election Day with voting info. Have a good afternoon.
Notice what is missing: a long policy debate, a personal story, or an attempt to handle objections. ID is a survey with a handshake.
Persuasion canvassing targets voters who might still move — usually undecideds and soft leaners on both sides. The goal is not just to learn their position but to shift it toward support.
A persuasion knock runs 2 to 5 minutes. You still ask a support question, but you listen for openings, offer a concise reason to support your candidate, handle one objection if it comes up, and ask again before you leave.
Research from Yale’s Institution for Social and Policy Studies and subsequent field experiments has consistently found that canvassing conversations on issues voters care about can move opinion — especially when the volunteer shares something personal and the voter engages for more than a superficial exchange. Persuasion works when it is targeted, brief, and human.
Volunteer: Hi, I’m Alex with the Rivera campaign. We’re talking to neighbors about the City Council race. Do you have a quick minute?
Voter: Sure, what’s this about?
Volunteer: Maria Rivera is a teacher at Lincoln Elementary. She’s running because the city keeps approving new apartments but won’t fix the roads in our neighborhood. If you had to vote today, where would you land?
Voter: I don’t know. I liked the incumbent.
Volunteer: That makes sense. A lot of people feel that way. What I’ve seen is the incumbent voted twice to delay the Main Street repaving project while approving two new developments on the same corridor. Maria lives three blocks from there — she drives it every day. Her whole platform is: fix what we have before we add more. Does that matter to you?
Voter: Yeah, the roads are terrible actually.
Volunteer: Would you be open to supporting Maria, or are you still leaning toward the incumbent?
Voter: I’d probably give her a shot.
Volunteer: Thank you — I really appreciate it. We’ll send voting info as Election Day gets closer.
The persuasion script has a listen → connect → re-ask structure. You do not win every undecided. You do not need to. Moving 1 in 5 undecided doors can win a close local race.
Think of your campaign in three field phases. Each phase has a primary mode.
In the first weeks — often before you even have a polished persuasion script — run pure ID across as much of your universe as you can afford. You need to know what the electorate looks like before you spend money and volunteer hours on targeted persuasion.
Once you have baseline data, shift volunteer energy to persuasion turfs: precincts and blocks with high concentrations of undecided and lean-opposition voters who are still realistically movable.
Do not send persuasion volunteers to doors you have already coded as strong opposition. That is a morale killer and a waste of time.
Get Out The Vote is neither ID nor persuasion. It is turnout. You knock known supporters and remind them to vote. If you need a refresher on that phase, see our GOTV field guide.
The most common mistake: volunteers keep running persuasion scripts in the final week because it feels more meaningful than “Hi, have you voted yet?” Meaningful does not mean effective. At GOTV, persuasion is mostly finished.
Imagine a voter who opens the door and says: “I haven’t really decided.”
Wrong ID response: Launch into a three-minute speech about the candidate’s resume. You have turned ID into persuasion without logging a clean baseline.
Wrong persuasion response: Say “Great, I’ll mark you undecided, thanks!” and walk away. You had a live undecided voter and did not make a case.
Right ID response: Confirm undecided, ask if they want a literature drop or email follow-up, log code 3, leave in under a minute.
Right persuasion response: Ask one open question (“What issues matter most to you in this race?”), tie one candidate strength to their answer, re-ask support, log the updated level.
Clean field data is what separates a professional operation from a weekend of good intentions. Every contact should capture at minimum:
In CanvassLite, volunteers log outcomes on each household as they knock. Managers see results on the dashboard in real time and can export after a shift for deeper analysis. The key discipline: log at the door, not in the parking lot. Memory fades and batches of guesses destroy your data.
Related: our guide on closing the loop after a canvassing shift covers QA and export workflows.
Raw door counts are vanity metrics. These numbers drive decisions:
Contacts ÷ doors attempted. Typical range for a well-built walk list is 25–40% on a first pass. Lower? Check your list quality, time of day, or whether you are hitting the same “not home” doors too early in the day.
After an ID phase, you want a district-wide picture: what percentage is 1s and 2s vs 3s vs 4s and 5s. If 30% of your contacts are undecided in a city council race, persuasion capacity should be your bottleneck — not recruiting more ID volunteers.
On persuasion turfs, track undecided or lean-opposition contacts who move at least one level toward support during the conversation. Campaigns rarely hit 50%. Consistent 15–25% on well-targeted lists is strong.
Compare turfs, not just individual volunteers. A turf with 40% strong support after persuasion passes is a GOTV goldmine. A turf stuck at 15% support may need a different message, a different messenger, or a decision to deprioritize it.
Back-of-napkin math: if a shift has 4 volunteers for 3 hours, 60 doors each, 30% contact rate, 20% persuasion conversion on undecideds — how many net supporters did you add? Divide volunteer hours (or paid organizer time) by that number. This tells you whether to expand persuasion weekends or invest elsewhere.
Do not assign the same walk list to both modes without filtering.
Overlap is the silent killer of field programs. Two volunteers persuading the same undecided on the same Saturday is one volunteer too many. See how to manage canvassing territories without overlap for turf-cutting methods.
Before each shift, tell volunteers three things:
Pair new volunteers with experienced knockers on persuasion shifts. ID shifts are easier entry points for first-timers because the script is short and rejection stings less when you are not trying to win an argument.
Yes. In a primary, persuasion often matters more within your own party — voters choose between similar-sounding candidates and need a reason to pick you. ID still runs first so you know who is reachable.
In a general election, persuasion targets crossover undecideds and soft partisans. Your ID data from the primary may be stale if the electorate expands. Plan a refresh ID pass in newly competitive precincts before the final persuasion push.
ID canvassing answers: Who is with us, who is against us, and who is still in play?
Persuasion canvassing answers: Can we move the people still in play?
Run them in order, on the right lists, with clear scripts and clean logging. The campaigns that win close races are not always the ones with the most volunteers — they are the ones that stop wasting doors once they know what each door is for.
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