(CNN) - He ruled out a bid earlier this month to challenge Pat Toomey for the GOP Senate nomination in Pennsylvania, but Tom Ridge isn't ready to back the conservative former congressman or any other candidate yet.
"I'm going to wait to see if people I know, whom I might support decide to make the difficult decision to run," said the former Pennsylvania governor on CNN's State of The Union.
Ridge also didn't rule out a 2010 vote for Arlen Specter, the longtime Pennsylvania Republican senator who defected to the Democratic Party earlier this month
"Tom Ridge has a secret ballot and that Tom Ridge will discuss it after the election," he said when asked about a potential Specter vote.
"I'm a strong, strong Republican but I'd be - I've never, ever, ever voted straight Republican ticket in my life and I never will," Ridge continued. "My mother was a Republican woman. My dad was a lifelong Democrat who switched once in a primary to vote for me. But at the end of the day, I think it's - when you close the curtain behind you, it makes America very unique. It's a secret ballot. "
The former Homeland Security Secretary, widely considered to be on John McCain's shortlist for vice president last year, also did not rule out a presidential bid of his own.
"Tom Ridge is going to do everything he can to make sure that we have a Republican governor in 2010. And in Pennsylvania. And will work within the Republican Party so that we win the presidency in 2012. And we'll just leave it at that," he said that.