BUTTE, Mont. (AP) Barack Obama is celebrating the Fourth of July on the campaign trail in Montana. Obama, his wife, Michelle, and their two daughters watched the Independence Day parade in Butte. The Democratic presidential candidate apologized for not walking the parade route, citing security concerns that he says might have ruined everyone's fun. The Obamas aren't just celebrating the nation's birthday, but also the birthday of older daughter Malia, who turns 10 today. The parade crowd broke out into a rendition of "Happy Birthday" in her honor. Obama joked that he told the birthday girl not to get caught up in all the fuss, saying "all the fireworks and stuff are not just for her." The Obamas are also slated to host a "family picnic" for hundreds of people that will double as both a campaign rally and a birthday party.