New U.S. House districts that could help Republicans win several additional seats in Florida are set to face their first test in court Friday against assertions that they violate a state constitutional ban on partisan gerrymandering. Lawsuits filed on behalf of voters ask a state judge to block the districts from being used in the midterm elections. The move would create a significant wrinkle in President Donald Trump’s attempt to hold on to a narrow House majority by redrawing voting districts to the GOP’s advantage. Republicans already hold 20 of Florida’s 28 U.S. House seats. New voting districts signed into law by Republican Gov. Ron DeSantis after a swift two-day special legislative session could improve the GOP’s chances to win four additional seats in the November elections. Florida’s Legislature approved the new House map on April 29 — the same day the U.S.…