On Wednesday Cook County Sherriff Tom Dart said he would not run for Chicago mayor. He was considered the main challenger to Rahm Emanuel, the former Obama White House chief of staff.

Meteorologists continue to marvel at the megastorm that blew through the Midwest Tuesday. Several peculiar weather events combined to make the storm historic.

The same gun was used in two recent shootings – one at the Pentagon and one at a Marine Corps building in Triangle, Va., authorities say. Few clues so far about the motive of the gunman.

AP - President Barack Obama apparently thinks politics is no laughing matter, even when he's staring down a comedian. Obama barely cracked any jokes during an appearance Wednesday on "The Daily Show" despite host Jon Stewart's attempts to draw out the president's humorous side with a few of his own snarky wisecracks.

AP - Republican leaders, ever more confident of their chances of winning control of the House and possibly even the Senate, have begun plotting a 2011 agenda topped by a push for more than $100 billion in spending cuts, tax reductions and attempts to undo key parts of President Barack Obama's health care and financial regulation laws.

AP - A Pakistani-born Virginia man was arrested Wednesday and accused of casing Washington area subway stations in what he thought was an al-Qaida plot to bomb and kill DC-area commuters.