WASHINGTON (AP) — Ben Carson is trying to reinvigorate his campaign for Republican presidential nomination by becoming the latest to question Barack Obama’s blackness ahead of critical upcoming votes.The retired neurosurgeon, hovering near the bottom of the GOP field, said in a series of recent interviews that Obama was “raised white” and doesn’t represent the “black experience” in the United States.“He didn’t grow up like I grew up,” Carson, the only black major party candidate in the 2016 presidential race, said on MSNBC. “Many of his formative years were spent in Indonesia. So, for him to, you know, claim that, you know, he identifies with the experience of black Americans, I think, is a bit of a stretch.”He also told Politico’s “Off Message” podcast released Tuesday that the president was “raised white.”Carson has come under racial criticism himself, but his comments helped him break through the cacophony of speeches and interviews by provocative front runner Donald Trump and rivals Ted Cruz, Marco Rubio and John Kasich. Carson came in near the bottom in last week’s GOP primary in South Carolina, and faces a struggle in the Super Tuesday primaries March 1.Carson’s “lashing out.