HOUSTON -- Republican Mitt Romney is telling black voters that he's a better choice than President Barack Obama to help build their neighborhoods and lessen unemployment among African Americans.

But Romney was greeted with boos from attendees at the NAACP's annual meeting Wednesday in Houston when he pledged to repeal "Obamacare." That's the name Republicans have given the health care overhaul that was passed by Democrats and recently upheld by the U.S. Supreme Court.

Romney said he wouldn't be running for president if he didn't think he could do a better job than Obama, the nation's first black president.

But Romney is unlikely to win the black vote. Some 95 percent of black voters backed Obama in 2008.

Romney was heckled at another point in the speech when he criticized Obama.