Analysis: Obama's centrist emphasis gives GOP ammo

Hence Obama has been highlighting positions anathema to the left on several issues, though some have long been part of his policy.

On Iraq, Obama said Thursday that his upcoming trip there might lead him to refine his promise to quickly remove U.S. troops from the war.

He now supports broader authority for the government's eavesdropping program and legal immunity for telecommunications companies that participated in it, supporting the bill after some protections were added.

The handgun control proponent reacted to the Supreme Court overturning the District of Columbia's gun ban by saying he favors both an individual's right to own a gun as well as government's right to regulate ownership.

Obama became the first major-party candidate to reject public financing for the general election after earlier promises to accept it.

He not only embraced but promised to expand Bush's program to give more anti-poverty grants to religious groups, a split with Democratic orthodoxy.

He objected to the Supreme Court's decision outlawing the death penalty for child rapists, drawing attention to his support for the death penalty if used only for the "most egregious" crimes.

Obama also said "mental distress" should not count as a health exception that would permit a late-term abortion, saying "it has to be a serious physical issue," addressing a matter considered crucial to abortion rights activists.

The GOP increasingly has sought to take advantage of any opportunity to permanently pin the flip-flopper label on Obama, with all its unappealing associations, and strip him of the shiny-new-penny one he's cultivated up to now.

"There appears to be no issue that Barack Obama is not willing to reverse himself on for the sake of political expedience," said Alex Conant, a spokesman for the national Republican Party.