Michigan Republicans have voted to hold a closed primary election to choose 2012 presidential convention delegates.

The Republican State Committee on Saturday approved the recommendation of the party's Policy Committee by a vote of 92-17.

Supporters say it's a more inclusive way of choosing delegates than a convention or caucus.

Under Michigan law a closed GOP primary would mean that people going to the polls would have to declare themselves Republicans before casting ballots.

Some who opposed the measure say it's closed in name only, since voters can say they are Republican.

State law calls for a presidential primary to be held next Feb. 28 but lawmakers could change the date.