Steve Kornacki

The extent to which hyper-partisanship of today got its start in the 1990s.

NBC's Steve Kornacki on today's headlines and his new book on the roots of hyper-partisanship

Mayor Dawn Zimmer alleges that Sandy funding was tied to a development deal in Hoboken. Caren Matzner, editor at the Hoboken Reporter, discusses the history of the Rockefeller project. Then Steve Kornacki, MSNBC host and Salon writer, discusses his reporting on the Zimmer allegations and the growing Chris Christie scandals.

Senator Marco Rubio generated a lot of positive buzz at this year's Conservative Political Action Conference (CPAC) in January. A dynamic young catholic Latino from Florida, Rubio charmed crowds with his sense of humor and looked like he could be the perfect young vice-presidential candidate. However, on Thursday BuzzFeed broke the story that Rubio was, for a few years of his life, Mormon.

For a man who has yet to officially declare his candidacy, there is immense hype surrounding Donald Trump as a Republican presidential contender. And it seems that GOP voters are interested — a recent Wall Street Journal/NBC poll of Republican primary voters had Trump tied for second place with former Governor Mike Huckabee at 17 percent, just a few points behind Mitt Romney, who came in at 21 percent. But our next guest isn’t buying it – in fact, he’s betting his savings that the Donald won’t enter the 2012 race. Joining us is Steve Kornacki, Politics Editor for Salon.com.

Last night was a big night for the Republican presidential candidates. Fred Thompson was on NBC's Tonight Show, and the rest of the candidates debated on Fox. Steve Kornacki, columnist for the New York Observer, and WNYC reporter Andrea Bernstein, pick the highlights and the low points of the night.