Treasurer Tim Cahill, in an interview with the Boston Herald, refused to rule out a primary challenge to Governor Deval Patrick in 2010. From the Herald:

The treasurer said he would “most likely” run for governor if Patrick isn’t in the race, but wouldn’t shut the door on running against him either.

“I don’t want to say either way, because I honestly don’t know,” Cahill said at a meeting with Herald reporters and editors. “It would depend on the situation that the state faces. Obviously, you’d have to believe you could do a better job, but it’s a huge uphill battle to challenge someone from your own party.”

The potential for an opening to a U.S. Senate seat does not appear to be enticing Cahill.

Cahill said he’s less interested in running for U.S. Senate than he is in making a bid for governor. “I enjoy being the boss,” he said. “I’m more interested in what’s happening here in Massachusetts.”

Cahill continued his criticism of Patrick, taking some jabs at his plans for toll removal in western Massachusetts.

Cahill has questioned some of Patrick’s economic policies and yesterday took aim at the governor’s plan to remove tolls in western Massachusetts as “irresponsible.”

He added that pushing the Big Dig debt to the Massachusetts Port Authority could hobble the agency.

“It doesn’t make economic sense,” Cahill said, adding he understands why it may be easier politically. “At some point you have to pay the bills.”

It would be a political battle royale if Cahill takes the plunge. Do you think he will, and if he does can he knock off a sitting Governor?