Republicans and Democrats are digging in their heels over the prospect that President Obama will soon nominate someone to fill the Supreme Court vacancy created with the death of Justice Antonin Scalia.

FOX's Jon Decker has more from the White House:

President Obama could nominate a successor to Justice Antonin Scalia as soon as next week when the Senate returns from a week-long recess.

But Senate Republicans, led by Senate Majority Leader Mitch McConnell, have said that they will not consider any nominee until after the next President takes office in 11 months.

Democrats have accused Senate Republicans of dereliction of their constitutional duty to advise and consent on presidential nominations.

As for Republican Senators in tough races, they must weigh the impact of energizing their base by standing up to the President against the potential damage of being labeled an obstructionist.

At the White House, Jon Decker, FOX News.