State Sen. Bruce Tarr is the latest Republican to consider a run in the special election for the U.S. Senate seat formerly held by John Kerry.

A spokeswoman for the Gloucester Republican said Wednesday he was "carefully weighing" a candidacy and would announce his decision Monday.

Another GOP lawmaker, Rep. Daniel Winslow of Norfolk, has formed an exploratory committee as he considers a Senate bid.

The party has been searching for candidates since former U.S. Sen. Scott Brown announced last week he would not run in the June 25 special election. Several other well-known Republicans have also bowed out of consideration.

Tarr leads the four-member Republican caucus in the Massachusetts Senate.

Tarr spokeswoman Lisa-Marie Cashman says Tarr will do what's in the best interest of his party.