Republican Senator John McCain is officially running for president. He made the announcement today in New Hampshire, touting himself as the most qualified candidate to take on formidable challenges.

• 共和党参议员约翰。麦凯恩今天在新罕普什尔州正式宣布参加总统竞选。他同时也鼓吹自己是有资格接受艰难挑战的最佳人选。