Democratic and Republican U.S. Senate hopefuls are racing to file any last minute voter signatures.

The filing deadline is 5 p.m. Wednesday. Four U.S. Senate hopefuls say they've collected more than enough signatures to get on the April 30 primary ballot and supporters of a fifth candidate say they've also crossed the critical hurdle. Former U.S. Attorney for Massachusetts Michael Sullivan had relied solely on volunteers to collect the 10,000 certified voter signatures needed to land a spot on the Republican primary ballot.

Supporters say he's met that goal. Fellow Republicans Gabriel Gomez and Daniel Winslow also say they've collected more than twice the number of certified signatures. Campaign officials for the two Democratic candidates, U.S. Reps. Stephen Lynch and Edward Markey,  also said they've collected enough signatures.

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