MEXICO CITY - Mexico's leftist presidential candidate threatened to disrupt the swearing in of his ruling party rival Saturday, a day after lawmakers blocked the outgoing president from delivering his state-of-the-nation speech to Congress in an escalating crisis over the July 2 election. Leftist legislators yelling for a recount of votes surrounded the congressional podium on Friday, leaving President Vicente Fox, wearing his presidential sash, standing at the door of the chambers with no choice but to hand in his annual, written report and leave. Leftist candidate Andres Manuel Lopez Obrador has said he will never recognize a victory by...