Cowan was selected by Gov. Deval Patrick (D-Mass.) to temporarily fill Kerry’s former seat. A special election will be held in June to decide who will serve Massachusetts on a longer-term basis. 

ADVERTISEMENT
Rep. Ed MarkeyEdward (Ed) John MarkeyDemocrats protest Trump's immigration policy from Senate floor Dems press EPA nominees on ethics, climate Lawmakers prep for coming wave of self-driving cars MORE (D-Mass.) has announced that he will run in the special election. Former Sen. Scott Brown (R-Mass.) has said he won’t run.

Kerry, who attended the swearing in, left the Senate to serve in President Obama’s cabinet as secretary of State. The Senate overwhelmingly confirmed Kerry for the position last week.

Members of the chamber applauded as Cowan signed the oath of office. Sen. Tim ScottTimothy (Tim) Eugene ScottGOP senators introduce bill to prevent family separations at border Anti-Trump Republicans better look out — voters might send you packing Senate GOP urges Trump administration to work closely with Congress on NAFTA MORE (R-S.C.), the only other African American currently serving in the Senate, was one of the first people to shake Cowan's hand after he was sworn in.