tonight on nightline, under pressure. president obama deliverers his state of the union address at a crucial moment, with his ambitious agenda stalled and sinking. so, did he persuade congress, and did he persuade you? report card. our expert panel is live to break down tonight s state of the union address. did the president pass his big test? plus, the ipad revealed. the name is already causing a stir, but will apple s newest must-have gizmo change the world again? we get our hands on one. announcer: from the global resources of abc news, with martin bashir and cynthia mcfadden in new york city and terry moran in washington, this is nightline, january 27th, 2010. good evening, i m terry moran, and we begin tonight with the big speech. president obama s state of the union address. a pivotal opportunity for him to steal back the momentum he took into office. but it s been a challenging first year, and the president has watched the popularity of his ambitious agenda