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Among the Tea Party successes in the 2010 congressional elections was U.S. Sen. Mark Rubio of Florida. The Cuban-American is a plus for Republicans, a party that polls show has been losing ground with Hispanics.

Pfizer's research on an experimental drug that attacks plaques in the brain has been discontinued. But scientists say they're hopeful that new treatments that attack a specific protein in plaques will have better success.

ATF agent Peter Forcelli testified in front of Congress about the failed gun-walking operation.

Steve Inskeep talks to Dr. Swaranjit Arora, a long-time member of the Sikh community in Milwaukee, Wisconsin. He discusses how things have changed in the community since he arrived in 1972.

Dr. Regina Benjamin wants a culture of fitness, and she's asking black women to stop worrying about their hair, and hit the gym. She's promoting a contest for the best gym-friendly hairdos.

Texas evangelist David Barton is not a historian, but his Christian-nation view of American history is wildly popular with conservative churches, universities and the GOP. His supporters call him a hero; his detractors say he's a danger.

The biggest single issue for Florida nurse practitioner Sofia Martinez is her support of the DREAM Act. But she plans to vote for Republican Mitt Romney, who has said he would veto the measure. Her view might seem full of contradictions, but that's common among voters in Hillsborough County, as they consider complex issues.

A controversy about identity has erupted in the race for U.S. Senate in Massachusetts. News outlets revealed Democrat Elizabeth Warren claimed Cherokee ancestry during her academic career, and critics say Warren isn't providing enough documentation to prove her identity. Host Michel Martin discusses just who is Native American.

In 2008, Democratic caucusgoers launched Barack Obama as a legitimate national contender, and voters later turned out in record numbers to put him in the White House. But now many of his past supporters are wary and worried, and he's locked in a dead-heat battle with GOP candidate Mitt Romney.

Four years ago, Wanda Kos voted for Barack Obama. Now, she says, she's on the fence. And her decision has taken on an added layer since 2008: Her son just joined the Army, so she'll be casting a ballot for his commander in chief.