Former Florida Gov. Jeb Bush — the younger brother of the president — is weighing a run for the Senate seat currently held by Republican Mel Martinez. ...Martinez announced Tuesday that he will not seek reelection in 2010. Asked whether he was interested in running for the seat then, Bush told Politico by e-mail Tuesday night: “I am considering it.” ...A source close to Bush said he'll be thoughtful and methodical about the decision-making process. He will consider the impact a race would have on his family and his business and whether or not the U.S. Senate is the best forum from which to continue his advocacy for issues such as education, immigration and GOP solutions to health care reform....In an interview with Politico immediately after November’s election, the former governor said the Republican Party should take four primary steps to regain favor with voters: Show no tolerance for corruption, practice what it preaches about limiting the scope of government (“There should not be such a thing as a Big Government Republican”), stand for working families and small business, and embrace reform.