After a summer of targeting individual House members in their districts, advocates for comprehensive immigration reform say they will escalate their efforts in the fall with larger rallies and demonstrations aimed at a national audience.

The shift in tactics comes as some leaders in the movement are voicing frustration that the more narrowly tailored activities used during the August recess have failed to maximize pressure on House Republican leaders to take up immigration legislation.

“I say that one of the problems we have is that Congress isn’t hearing enough from the American people, that we’re using too many sophisticated methods of communication,” Rep. Luis Gutiérrez (D-Ill.) told reporters earlier this week. “We’re buying ads there, and radio ads there, and hiring this lobbyist there. We need people power, and we need to concentrate.”