NAACP: Trump declines offer to address civil rights group

ATLANTA (AP) — The NAACP says Republican presidential candidate Donald Trump has declined an invitation to address the group's upcoming convention, flouting established precedent and highlighting anew the GOP standard-bearer's struggle to attract support from nonwhite voters.

Republican nominees John McCain in 2008 and Mitt Romney in 2012 addressed the NAACP convention, though Romney was booed when he told attendees he'd be better for black families than President Barack Obama had been during his first term.

Black voters, who already helped propel Clinton to the Democratic nomination over Vermont Sen. Bernie Sanders, will be integral to the general election outcome.

African-Americans cast about 13 percent of presidential ballots in 2012, according to exit polls conducted for the AP and television networks.