David Malpass, one of the two Republicans now vying for the right to face Democratic Sen. Kirsten Gillibrand on Row B in November, slammed the junior senator for abandoning her Blue Dog days and embracing a more liberal ideology since inheriting Hillary Clinton’s old seat.

Malpass hit Gillibrand for supporting health care reform and for voting last September in favor of continuing federal funding to one of the conservatives’ favorite targets, ACORN, which was something even her mentor, Sen. Chuck Schumer, declined to do.

“When Sen. Gillibrand votes on a bill, what is she thinking; is she thinking of New Yorkers or is she thinking about (Senate Majority Leader) Harry Reid?” Malpass said.

Senator Gillibrand, on the other hand, campaigned for Congress as a conservative Democrat…now she supports every one of the those liberal policies….After 18 months as Senator ACORN, she has erased every trace of her opportunistic conservatism.”

Malpass also called Gillibrand a “loyal vote for Washington’s expansion” who is “guarding the interests of Chuck Schumer, Harry Reid and (House Speaker) Nancy Pelosi,” adding: “But who has the backs of New Yorkers? I can and will stand up for you.”

Malpass also castigated the Obama administration on Israel, saying the White House has “hung Israel out to dry, and our enemies are taking full advantage of it.” He accused Gillibrand of being “silent” on the issue.

Malpass didn’t say a word about his GOP primary opponent, Bruce Blakeman, who received 51.42 percent of the vote and became the GOP’s official nominee.

Blakeman, who took the stage first, mentioned neither Malpass nor (oddly) Gillibrand.

He talked a lot about his family (his son graduated from high school this morning, causing his father some scheduling conflicts), and called the US “mankind’s best hope” and promised to “fight for the hardworking families of New York.”

UPDATE: A Gillibrand spokesman sent the following response to Malpass’ comments:

“While Senator Gillibrand fights every single day to protect New York taxpayers – from opposing the flawed Wall Street bailout to delivering middle class tax cuts that save our families money and help small businesses create jobs – our opponents want to keep driving a million miles an hour with their hands off the wheel and their foot on the gas.”

“In his role as chief global economist for Bear Stearns, David Malpass not only helped cause the financial collapse, he made millions and left taxpayers holding the bill. ”

“Senator Gillibrand will take a back seat to no one when it comes to fighting for New York families and creating good-paying jobs in our state.”