Former Massachusetts governor Bill Weld (R) will not run in this year's special election for the Senate seat vacated by Sen. John Kerry (D-Mass.), the Associated Press reports. Meanwhile Tagg Romney, the eldest son of former Massachusetts governor Mitt Romney, is considering a bid.

Republicans are searching for a candidate for the June 25 election now that former senator Scott Brown has announced that he will not run. Democrats have rallied around Rep. Ed Markey, although he faces a primary challenge from Rep. Stephen Lynch.