CNN is marking President Barack Obama's 100th day in office with prime-time coverage that will recall last year's primary and general election nights, right down to anchor John King's magic wall. The network says it will compile a national report card of Obama's performance, using opinion polls and a series of viewer surveys. The big night is Apr. 29, pre-empting regular programming. Most of the anchors and commentators who were CNN regulars on political nights last year will appear. “This is the perfect day to have commentary about how the president is doing and the perfect day to ask the public how they think the president is doing,” said Sam Feist, CNN's political director. CNN will review actions taken by the Obama administration and give viewers a chance to grade him, the Cabinet and Congress, Feist said. CNN won a prestigious Peabody Award for its primary and debate night coverage last year and, given consistently high ratings for these political nights, would love an encore.