SAN FRANCISCO (Reuters) - A federal appeals court on Tuesday struck down an Arizona requirement that residents prove U.S. citizenship in order to register to vote but upheld a mandate that they present identification before casting their ballots.

Rubio, at 39, is on the young side for a politician and often looks it: he has a boyish grin that he works busily on the campaign trail.

FBI says white powder in package mailed to Grijalva's office wasn't toxic. The FBI says white powder that was mailed to U.S. Rep. Raul Grijalva's (gree-HAHL'-vuhz) office wasn't toxic.

FBI investigating envelope containing white powder sent in mail to office of Ariz. congressman. The Tucson office of U.S. Rep. Raul Grijalva, D-Ariz., was evacuated Thursday after an envelope containing a white powder was discovered in the office's mail.

LAS VEGAS (Reuters) - Hispanic labor leader Geoconda Arguello-Kline's members work in low-key jobs like cooking, making beds and fetching drinks for visitors to Las Vegas.

Hispanic media plays growing role in election year, breaking news even in English. Note to candidates: What plays in Spanish no longer stays in Spanish.

Univision yanks ad urging Hispanics not to vote after outcry from Democrats. A Republican campaign urging Latinos not to vote has been yanked from the airwaves amid an outcry from Democrats that it was a dirty trick against Senate Majority Leader Harry Reid in his hotly contested race against Republican Sharron Angle.

Crist tries to distance self from Obama in Fla. Sen. debate; Rubio battles extremist label. Gov. Charlie Crist tried to distance himself from President Barack Obama in a debate Tuesday after months of reaching out to Democrats in his independent bid for Senate, and Republican Marco Rubio made a case against the extremist tag his opponents are giving him.

State legislators join to prepare legislation to deny citizenship to illegal immigrants's kids. The state senator in Arizona who wrote the nation's toughest law against illegal immigrants said Tuesday he's collecting support across the country from legislators to challenge automatic U.S. citizenship to the children of illegal immigrants.

The photograph that has become the focus of controversy in campaign commercials by Republicans Sharron Angle and Louisiana Sen. David Vitter shows three Hispanic men posing with the words "ILLEGAL ALIENS" superimposed across their chests.What the Republicans fail to mention is that the men pictured are Mexican residents who were photographed in Mexico, a fact clearly pointed out in the caption provided by the photographer who took the shot, Chris Floyd. There's no evidence the men ever entered America illegally.

Napolitano: Border Patrol arrests fall 17 percent in 2010 due to heightened enforcement. Homeland Security Secretary Janet Napolitano said Monday a 17 percent drop in Border Patrol arrests this year shows heightened enforcement is slowing illegal immigration.

Republican Sharron Angle tells Hispanic students they look Asian, says she's been called Asian. Nevada U.S. Senate candidate Sharron Angle told dozens of Hispanic high school students last week that "some of you look a little more Asian to me," inducing gasps from the crowd and marking the latest eyebrow-raising remark she has uttered on the campaign trail.

US Rep. Luis Gutierrez says he's not running for Chicago mayor. U.S. Rep. Luis Gutierrez says he's not running for Chicago mayor.

US government touting new National Guard mission in Arizona while limiting reporters' access. Government officials on Friday showed off a site where National Guard members have been deployed near the Mexican border, despite criticism that the troops will do nothing to stem the tide of illegal immigration.

A look at candidates' sniping, sparring and stumbles from debates this midterm election year. A look at the insults, stumbles and sparring from the debates in this midterm election year:

The United States deported a record 392,000 illegal immigrants over the past year, nearly half of them people with criminal convictions, Homeland Security Secretary Janet Napolitano said Wednesday.

Ariz. governor opposes ruling that lets Mexico offer viewpoints in immigration appeal. Arizona Gov. Jan Brewer is opposing a court ruling that lets other countries file a friend-of-the-court brief in her appeal of a decision that put parts of the state's new immigration law on hold.

Pew Hispanic: Half of Latino registered voters say they're going to polls, favor Democrats. In a year when Democrats are struggling to energize supporters, Hispanic voters appear significantly less motivated than the rest of the U.S. to cast election ballots even though two-thirds of Latino registered voters say they'll vote Democratic in their congressional race, a Pew Hispanic Center study found.

Supreme Court opens new term Monday with Justice Kagan on the bench, denial of appeals. The Supreme Court opened its new term with Justice Elena Kagan on the bench.

New Justice Kagan on the bench as Supreme Court opens its new term on Monday. The Supreme Court is starting its new term with a new justice, Elena Kagan, and bad news for hundreds of parties trying to get their cases heard at the nation's highest court.