It was announced on Tuesday that Senator Thad Cochran (R-Mississippi), is endorsing Governor Jeb Bush. From the press release:
Manchester, New Hampshire — Sen. Thad Cochran, R-Mississippi, is backing Jeb Bush for president, the former Florida governor’s campaign is announcing Tuesday.
The endorsement marks Bush’s fourth Senate endorsement and 30th total from a member of Congress.
“Jeb Bush is the proven leader the American people need as we face grave threats from abroad and continued economic challenges at home. Jeb is a serious leader with executive experience and a forward-looking vision,” said Cochran, who’s now in his seventh term in the Senate.
Bush also has support from Sens. Orrin Hatch of Utah, Dean Heller of Nevada, and Susan Collins of Maine.