Pennsylvania Democrats have registered in record numbers for the state's April 22 primary following a late surge to Monday's deadline. The last minute rush put the total number over 4 million, a 4 percent bump over both 2006 and 2004 at this point in the cycle. GOP registration declined slightly over the last 2 cycles.

Over 120,000 Democrats have registered for the first time since Jan. 1. An additional 86,000 switched their party affiliation from either Independent or Republican.

At first look, a break down by county shows the bump spans accross the state to areas of strength for both Sens. Barack ObamaBarack ObamaObama reflects on his legacy as presidency comes to an end Confirm Gary Richard Brown for the Eastern District of New York Megyn Kelly: Trump and First Amendment 'not a beautiful match' MORE (D-Ill.) and Hillary ClintonHillary Rodham ClintonFederal judge kills recount effort in Michigan Keith Ellison is the leader the DNC needs Overnight Cybersecurity: Retired general picked to head DHS | Graham vows to probe Russian election interference MORE (D-N.Y.).

Recent polls show Clinton's lead over Obama anywhere from 12 to 26 points.