Democratic Rep. Corrine Brown and Republican Rep. Mario Diaz-Balart spend most of their time on opposite sides of the political aisle in Congress and rarely agree on much — except when it comes to redistricting.

Only hours after voters approved a constitutional amendment in November 2010 to impose new rules on the once-a-decade process of redrawing congressional district lines, the two filed a lawsuit to invalidate it.

The complaint, filed in Miami federal court, claims Amendment 6 violates the Constitution because it infringes on the power of Congress to regulate federal elections. U.S. District Court Judge Ursula Ungaro will hear arguments beginning Friday morning. More here.