Pennsylvania Republicans on Wednesday filed an emergency appeal asking the U.S. Supreme Court to block a new congressional map drawn by the state’s top court from taking effect ahead of this year’s mid-term elections.The Supreme Court rejected a similar petition from the state’s Republican legislative leaders earlier this month, paving the way for a new map for the state’s U.S. congressional districts.

The new map, which the court released on Monday, is widely seen as giving Democrats a far better chance of capturing multiple seats in U.S. House of Representatives in the November elections. Republicans have held 13 of the state’s 18 U.S. House seats since 2011. Democrats need to win 24 seats nationally to retake control of the House from Republicans.

Separately, state Republicans are planning to file a new federal lawsuit as soon as Thursday in Harrisburg, the state capital, challenging the state court’s ruling, according to Republican officials.

Wednesday’s filing argued the state’s top court failed to provide lawmakers with enough time or guidance to draw a new map before it stepped in and took over the process, usurping the legislature’s constitutional authority to set congressional district lines. The Republican leader of the state House, Mike Turzai, said in an interview that the new map was “clearly partisan.”

The Pennsylvania Supreme Court has five Democratic justices and two Republicans and voted along strict party lines to throw out the old map. President Donald Trump on Tuesday encouraged his fellow Republicans to contest the new map in court.

The case is one of several nationwide challenging partisan gerrymandering, in which lines are manipulated to bolster one party at the expense of another. The U.S. Supreme Court is scheduled to decide similar cases from Wisconsin and Maryland this year.