The poll commissioned by NBC/Marist College, focused on Trump/Bush matchups with Clinton in early caucus/primary states of Iowa and New Hampshire, which also happen to be competitive, but
|Vice President Joe Biden|
In Iowa, Trump leads Clinton by 5% while Bush leads by 11%. Republicans have not won Iowa since 2004.
In New Hampshire, Clinton leads Trump by 1% but is trailing Bush by 5%. Republicans have not won the Granite State since 2000.
Unfortunately, the poll didn't look at other matchups. It would have been nice to see how Republican candidates like brain surgeon Ben Carson or Texas Senator Ted Cruz fared against Clinton.
The poll also shows, on the Democratic side, Clinton leading Vermont Senator Bernie Sanders 38-27 in Iowa but trailing 41-32 to Sanders in New Hampshire.
The poll also looked at Biden v. Trump/Bush matchups, finding the Vice President leads Donald Trump by 4% in Iowa and 9% in New Hampshire. Bush, however, leads Biden by 2% in Iowa and 1% in New Hampshire.
In short, comparing Biden's appeal to Clinton's, when squared off against Republican candidates
Biden v. Trump (Iowa) positive 9% swing
Biden v. Trump (New Hampshire) 8% swing
Biden v. Bush (Iowa) positive 9% swing
Biden v. Bush (New Hampshire) positive 4% swing
As a Republican, I've been saying Joe Biden would be a much tougher general election candidate than Hillary Clinton. I think this polling confirms that.