NEW ORLEANS (AP) — Politics and race are both factors in a pending court challenge of Louisiana’s new congressional maps. How much weight each carries is a major question before three federal judges whose ruling could affect the balance of power in the next Congress.

At issue is a congressional map that was approved this year with the backing of the state’s new governor, Jeff Landry — to the consternation of at least some of his fellow Republicans.

The map creates a new mostly Black congressional district in Louisiana, at the expense of a white Republican incumbent, Rep. Garret Graves, who backed another Republican in the governor’s election last fall. Given voting patterns in Louisiana, a mostly Black district would be more likely to send a Democrat to Congress.

Twelve self-described non-African American voters argued in a lawsuit that the new mostly Black district constitutes illegal “textbook racial gerrymandering.”