A progressive activist organization with ties to former President Obama is launching an immigration-focused ad campaign targeting Republicans who represent Latino-heavy districts.

Organizing for Action (OFA), an offshoot of Obama's 2012 presidential campaign, will launch the static web ads in Arizona, Nevada, Texas, California, Colorado, Florida and Pennsylvania.

The ads, which ask constituents to tell their representatives "not to fund the administration's wall and deportation force," will be aimed at 17 House members and four senators, showing a lawmaker's photo with a phone number.

Coming back from a two-week recess Monday, Congress must reach a deal to fund the government before April 28 to avoid a shutdown.

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Senate Democrats have pledged to block any budget proposal that includes funding for the wall.

Many of the members targeted by OFA's campaign have avoided outright support for the wall, President Trump's signature campaign proposal, and some have publicly come out against it.

Reps. Will Hurd (R-Texas) and Carlos Curbelo (R-Fla.) are also being targeted. Both have come out against the border wall plan but narrowly unseated Democrats in 2014.

The ads will also focus on Arizona Rep. Martha McSally; California Reps. Jeff Denham, David Valadao, Devin Nunes, Steve Knight, Ed Royce and Darrell Issa; Colorado Reps. Scott Tipton and Mike Coffman; Florida Reps. Brian Mast, Mario Diaz-Balart and Ileana Ros-Lehtinen; Pennsylvania Rep. Charlie Dent; and Texas Reps. John Culberson and Pete Sessions.