Handbook·Does it work?

Is it better to contact state legislators than Congress?

Evidence·Verified 2026-07-10

Verdict

Yes, and this is one of the better-evidenced claims in the whole cluster. Contacting state legislators has been shown, in randomized experiments with real legislators, to causally shift their position on a specific request. Congress has no comparable causal evidence. The strongest version of this lever isn't a single message, it's the same low-contact environment exploited by an organized, repeated constituent push. Grade: STRONG for state legislators, thin for the Congress side of the comparison.

What the research says

Two randomized field experiments run directly with sitting state legislators in Michigan and New Hampshire found that constituent contact causally increased the legislator's likelihood of supporting the specific request made: about a 12 percentage point increase in Michigan, about 20 points in New Hampshire for key requests1. This is causal evidence, not correlation, because the researchers randomized who got contacted, then measured the change in legislator behavior directly. That's a substantially stronger evidentiary bar than exists for the equivalent question about Congress, where existing handbook evidence already notes the absence of comparable proof that contact changes a member of Congress's vote23.

This causal state-level finding reinforces the existing handbook claim that state legislators are structurally more reachable.4 They represent far fewer constituents per seat, have smaller staffs that track incoming contact more closely, and, per this new evidence, demonstrably change position in response to it.

A separate large-scale correspondence audit of state legislators is an important honesty check. It found that reply rates weren't equal across constituents: putatively Black senders received fewer replies than putatively white senders in a multi-state experiment5.

What it doesn't say

The state-legislator causal studies are from 2011 to 2015. No large-scale contemporary replication was found confirming the same effect size in the 2020s political environment. The comparison to Congress here is an inference across two separate bodies of research, state audit and experiment studies versus Congress-focused correlational work cited elsewhere in the ledger, not a single unified experiment running the identical protocol on both bodies at once.

What this means for you

If you have to choose where to spend limited contact effort, a state legislator is both easier to reach and has been shown, in real randomized experiments, to actually change position in response to constituent contact, something not yet demonstrated with equivalent rigor for members of Congress. Contact isn't guaranteed to get an equal reply regardless of who sends it, so pair a message with whatever identifies you as a constituent (address, district, voter registration) rather than relying on a form letter alone.

How people actually move this

State legislators represent far fewer people per seat and staff less capacity to absorb contact than Congress does, which is why a small, organized, repeated constituent bloc has outsized leverage there. California's SB 79 shows this at scale: after two failed prior attempts, the winning 2025 push combined more than 2,500 targeted calls to specific swing legislators with an in-person "ditto" testimony strategy, many distinct constituents each briefly on record, rather than one lobbyist or one form letter6. That scales up the same mechanism the Michigan and New Hampshire studies found at the individual level, contact changes position, by coordinating dozens of constituents around the same vote.

The move for an individual is to treat a single message as one contact in a coordinated, repeated series, organized with others contacting the same office around the same vote, each with a real personal stake stated plainly rather than a shared script. Contact from people the legislator's constituents already trust compounds this further, the same mechanism behind outsized turnout effects in get-out-the-vote work7.

Sources

  1. Broockman, David E. and Daniel M. Butler, field experiments on state legislator responsiveness (Michigan and New Hampshire constituent-contact studies), 2015. source ↩

  2. EA Forum, "Talking to Congress: Can constituents contacting their legislator influence policy?" 2021. source ↩

  3. Congressional Management Foundation, "Perceptions of Citizen Advocacy on Capitol Hill," 2011. source ↩

  4. Judge-Lord, "Who Responds to Whom? Constituent Correspondence and Congressional/State Responsiveness," 2024. source ↩

  5. Butler, Daniel M. and David E. Broockman, "Do Politicians Racially Discriminate Against Constituents? A Field Experiment on State Legislators," American Journal of Political Science, 2011. source ↩

  6. California YIMBY / YIMBY Action campaign coverage of SB 79 (Sen. Scott Wiener), 2025. source ↩

  7. Campaign innovation field test on relational (friend-to-friend) organizing via the Outvote/Impactive app platform, 2018. source ↩