Pennsylvania Republicans are again asking the U.S. Supreme Court to block a congressional map issued by the state supreme court that would likely put several Republican-held seats in play for Democrats. In an emergency application filed late Wednesday, lawmakers claimed the Pennsylvania court overstepped its authority.

Why it matters: The U.S. Supreme Court ruled earlier this month that Pennsylvania's high court could move forward in redrawing the map. While the legal challenge was expected, it comes a day after the President Trump urged Republicans to appeal the new map. The Pennsylvania Supreme Court ruled last month that the previous Republican-drawn map “clearly, plainly and palpably" illegally hurts Democrats.