The Rasmussen Reports daily Presidential Tracking Poll for Sunday shows ongoing volatility in the Democratic Presidential Nomination. Nationally, Hillary Clinton now holds a very slight advantage over Barack Obama, 46% to 44%. For the past week-and-a-half, Obama’s support has been between 44% and 47% every day. Clinton’s support has ranged from 42% to 46% (see recent daily results). In discussing the Pennsylvania Primary, Governor Ed Rendell indicates that the Clinton campaign is ready to keep fighting to the end of the primaries and beyond. Looking ahead to the General Election in November, John McCain continues to lead both potential Democratic opponents. McCain leads Barack Obama 50% to 41% and Hillary Clinton 49% to 42% (see recent daily results). New polling shows McCain narrowly behind both Democrats in Nevadawhile McCain has a solid lead over both in North Carolina.March has been a good month for John McCain. But, a Rasmussen Reports video notes that a good month of March doesn’t get you to the White House, that requires a good day in November. There is at least one major issue standing between McCain and a victory celebration in November. On Monday, McCain is viewed favorably by 55% of voters nationwide and unfavorably by 42%. Obama’s reviews are 46% favorable and 52% unfavorable. For Clinton, those numbers are 42% favorable, 55% unfavorable (see recent daily results). The Rasmussen Reports Balance of Power Calculator shows Democrats leading in states with 200 Electoral Votes while the GOP has the advantage in states with 189. When “leaners” are added, the Democrats lead 247 to 229. Over the past month, McCain has gained ground in Ohio,Michigan, Minnesota,Colorado, New Hampshire, and Pennsylvania. He leads both Democrats in Georgiaand Arkansas.Both Democrats continue to lead in New York, Massachusetts, Connecticutand California (see summary of recent state general election polling). Daily tracking results are collected via nightly telephone surveys and reported on a four-day rolling average basis. The next Presidential Tracking Poll update is scheduled for Tuesday at 11:00 a.m. The results are also compiled on a full-week basis and crosstabs for the full-week results are available for Premium Members. See crosstabs for general election match-ups, favorable ratings and Democratic primary.