Arizona's new map for legislative district has been approved, but Republicans remain unhappy.

The U.S. Justice Department on Thursday notified the Arizona Independent Redistricting Commission that it has no objections to the new legislative map, clearing the way for its use in this fall's primary and general elections.

But Arizona House Speaker Andy Tobin said he and other Republicans remain unhappy with the map, saying it doesn't adhere to state constitutional parameters.

Tobin said he is considering asking fellow legislators for permission to file suit over the legislative map so that a new one can be drawn more favorable to Republicans.

Tobin and other Republicans have expressed displeasure with the process almost from day one, saying the commission leaned Democratic, operated in violation of the state Open Meeting Law and came up with a legislative map that favors Democrats.

The map includes new lines for all 30 legislative districts in Arizona. Sixteen districts have a majority of Republican registered voters in them, and approximately another eight favor Democrats, including Latinos, who usually vote Democratic. The rest, approximately six districts, are considered competitive, with roughly equal numbers of Republicans and Democrats.

Republicans currently have a plurality of state registered voters, about 36 percent. Democrats have 30 percent and voters registered with neither party total about 34 percent.

Newly drawn maps for legislative and congressional districts were sent to the Justice Department for pre-clearance because Arizona must adhere to dictates of the Voting Rights Act, protecting minorities. Justice cleared the congressional map earlier this month.

Your Vote 2012: The AZPM Election Center