What could be the final primary debate between Republicans running for Pennsylvania’s open U.S. Senate seat devolved into a string of attacks.

Sean Parnell announced his candidacy Tuesday for the Republican nomination for Pennsylvania’s open U.S. Senate seat.

Fetterman will run for U.S. Senate, making the announcement Monday, Feb. 8, 2021 after kicking off an exploratory fundraising campaign last month that raised over $1 million. (AP Photo/Keith Srakocic)HARRISBURG, Pa. – Pennsylvania’s larger-than-life lieutenant governor, the 6-foot-8, bald and tattooed John Fetterman, will run for U.S. Senate, making the announcement Monday after kicking off an exploratory fundraising campaign last month that raised over $1 million. Another possibility is Jeff Bartos, a suburban Philadelphia real estate investor who started running for U.S. Senate before switching horses to become Fetterman's opponent for lieutenant governor in 2018. AdThe Senate seat in the presidential battleground is being left open after two-term Republican U.S. Sen. Pat Toomey announced in October that he would not run again. Considering that kind of disgrace to the Senate, his style “should be the last of our concerns," Fetterman said.