Four House Democrats are headed to Dallas next week as the Republican National Committee holds a first-of-its-kind midterm convention, House leadership announced on Friday. Reps. Robert Garcia, (D-Calif.), Jason Crow (D-Colo.), Madeleine Dean (D-Pa.) and Sydney Kamlager-Dove (D-Calif.) make up the delegation, which will partner with local leaders and the Texas Democratic Party on the…