Updated

Michigan GOP officials have voted to change the way they award 30 delegates from the presidential primary, a day after the tally showed native son Mitt Romney and Rick Santorum each getting 15.

The Michigan Republican Party Credentials Committee voted 4-2 Wednesday night to instead award 16 delegates to Romney and 14 to Santorum.

Twenty-eight of Michigan's delegates were awarded based on the results in each of the state's 14 congressional districts. Two went to the winner of each district. Romney and Santorum each won seven districts, so those 28 delegates were split.

Party rules say the final two delegates were supposed to be awarded proportionally, based on the statewide vote. That would result in one apiece. Instead, the credentials committee voted to give both delegates to Romney.