"There is little doubt that Democrats will add seats this year. The question is how close they can get to erasing the Republicans’ 30-seat advantage.
This is Hotline’s ranking of the 15 districts most likely to flip party control, though many more could change hands as well. The top four races are the direct result of redistricting, rather than any Democratic or Republican efforts, and saw no change since our last rankings in March. The selections become far more fluid farther down the list."