Vice President Joe Biden will head to Delaware sometime next week to campaign for the Democrat hoping to fill his former Senate seat. 

According to CNN, Biden will stump on behalf of New Castle County Executive Chris Coons, who faces Tea Party-backed Christine O'Donnell in November. 

It comes as no surprise that Biden will campaign for Coons, and Republican strategists say they expect to see him in the state more than once ahead of November. But the fact that Biden is being deployed so quickly suggests Democrats are anxious to cut off any momentum that may be building for O'Donnell, who has gotten significant national attention since her primary victory Tuesday.

In an interview on MSNBC Wednesday, Biden called O'Donnell's win in the primary "hard to explain" and said it showed the message from the GOP is "No moderates need apply." 

The first poll of the general election, conducted by Rasmussen Reports, still shows Coons up by double digits. 

But O'Donnell has shown some fundraising prowess since she upset Rep. Mike Castle (R-Del.) in Tuesday's primary. O'Donnell has raised more than $1 million online since then.