Albany, N.Y. ? Claiming Sen. Hillary Rodham Clinton is running for the White House, New York’s GOP chairman has kicked off a national “STOP HILLARY NOW!” fund-raising effort to thwart her 2006 Senate re-election bid.

“Stopping Hillary Rodham Clinton is the most important thing you and I can do as Republicans in the next two years,” says the fund-raising appeal sent out by Stephen Minarik. “You could say it’s our duty as Republicans.”

Minarik’s fund-raising letter, dated Friday, promises a Republican “truth squad” that will “monitor Hillary’s appearances and expose her lies.”

While Minarik has sent out similar missives to New York Republicans, Friday’s appeal — a copy of which was obtained by The Associated Press — is his first to the potentially more lucrative national anti-Clinton audience.

Clinton, who has said she is not looking beyond her Senate re-election effort, has countered with fund-raising appeals of her own, including a March 31 e-mail warning supporters she is “the No. 1 target for the right-wing attack machine.”

Spokeswoman Ann Lewis said Sunday that the Clinton campaign was “not surprised that the Republican Party has chosen to wage a personally negative campaign.”

Complicating Minarik’s anti-Clinton effort is the fact that the state party has yet to come up with a big-name challenger to take her on in 2006. Minarik’s mentor, Gov. George Pataki, has said he has no interest in being a senator and former New York City Mayor Rudolph Giuliani’s top political aide said Giuliani is too busy with business interests to run for office next year. Both men are considered potential 2008 presidential candidates.