That means that unless there is a counter ruling by the U.S. Supreme Court, the GOP-friendly maps will be in place for the next decade. They are set to go into effect in November.

Walker spokesman Cullen Werwie said options for fixing the maps include a special session, an extraordinary session, or the court could redraw those districts. There is also a limited-business floor period from April 24 to May 3.

But Senate Republican Leader Scott Fitzgerald, R-Juneau, said he can't understand why the Legislature would come back for another session to make the minor changes required by the court and vote on the maps.

"Why would you go back to the Legislature?" Fitzgerald said.

The judges said their ruling "is not intended to affect any other district" and re-drawing those lines "must occur within the combined outer boundaries of those two districts."

Since the maps passed the Legislature last summer, Republicans lost control of the Senate, which is now split evenly 16-16 after a GOP senator resigned last week.

Election boundaries must be redrawn every 10 years to account for population shifts in an effort to ensure that political districts throughout the state roughly include the same number of voters.