The chief counter terrorism adviser to U.S. President Barack Obama, John Brennan, criticized on Saturday the European Union over its failure to label Hizbullah a terrorist organization, which is undermining international counter terrorism efforts.

European resistance “makes it harder to defend our countries and protect our citizens,” Brennan said in a speech to the Institute of Institutional and European Affairs in Dublin.

U.S. Secretary of State Hillary Clinton is leaving the door open to continuing to serve under President Barack Obama should he win a second term that would begin in January.

One of Obama's most popular cabinet members, Clinton has repeatedly insisted she would leave her office as America's top diplomat at the end of the Obama administration's first term.

Katy Perry's doing her best get-out-the vote effort: At a rally for President Barack Obama, she wore a tight white dress imprinted like a ballot, and a square box on her right hip filled in the names of Obama and Joe Biden.

Perry gave a free concert at a park in a historically minority neighborhood just northwest of downtown Las Vegas to screaming fans at about 9 p.m., the same time Air Force One landed at McCarran International Airport across town.

Barack Obama's campaign team urged reporters not to get "distracted" by a word on Thursday after the U.S. president was quoted using a profane term to tag rival Mitt Romney as dishonest.

Obama communications director Dan Pfeiffer did not deny Obama had used the word "bullshitter" in a conversation with journalists from the magazine Rolling Stone, and insisted: "Trust is a very important part of this election."

In a spectacular finale on Thursday to a 40-hour campaign sprint, U.S. President Barack Obama launched a searing attack on Mitt Romney in Ohio, the state that may decide their election duel.

But Romney, rallying Republicans in the state's aptly named town of Defiance, mocked Obama's "incredibly shrinking" campaign and stole the president's 2008 mantra, promising "big change" if he wins on November 6.

People around the world overwhelmingly favor U.S. President Barack Obama over his Republican challenger Mitt Romney, a poll carried out for the BBC World Service has found.

An average of 50 percent favored Obama, against nine percent for Romney, with Pakistan the only one of the 21 countries questioned indicating they would prefer to see Romney win the election in November.

French Prime Minister Jean-Marc Ayrault has broken with diplomatic protocol by openly expressing his hope that Barack Obama wins the upcoming U.S. presidential election.

"If I was an American citizen I wouldn't hesitate to vote for Obama," he told a radio interviewer on Wednesday.

Republican White House hopeful Mitt Romney said President Barack Obama's campaign was "taking on water" Tuesday, as the rivals barnstormed across toss-up states while seeking swing votes two weeks before election day.

With their debates behind them, the candidates raced out of the blocks and onto the campaign trail, hoping to corral the most ballots from the shrinking pool of Americans still undecided in a race heading for a photo finish.

Barack Obama pummeled Mitt Romney as "all over the map" on foreign policy, dismissing his "wrong and reckless" leadership in a heated final debate of a knife-edge White House race.

With just two weeks until polling day, Obama has unexpectedly found himself running neck-and-neck with his once unfancied challenger, and Monday's face-off on world affairs was perhaps a last chance to land a decisive blow.

After days of cramming, two intense earlier debates, and a bitter months-long campaign, Barack Obama and Mitt Romney will come out swinging Monday in their third and final showdown.

With this rematch focusing on foreign policy, the president and his Republican rival will no doubt trade blows over security shortcomings in Libya; how to contain Iran; the roiling crisis in Syria; a rising China; and ending the Afghan war.