Nothing makes a bigger impression on lawmakers than a visit from constituents, according to a new report released Friday that examines strategies for lobbying Congress. The Congressional Management Foundation (CMF), in a three-year survey of Capitol Hill staffers, found that constituent visits to the Washington office (97%) and to the district office (94%) have “some” or “a lot” of influence on undecided lawmakers, more than any other strategy. The group is releasing a research-based guide for individuals and groups on how to schedule, conduct and follow-up on meetings with lawmakers.”