It's been "radio silence" from the Romney campaign, according to @JimAcostaCNN. Will he be making a concession speech soon?

Vice President Joe Biden has called several Democratic candidates, campaign officials told reporters traveling with the vice president.

The officials said he called:

- Rep. Tammy Baldwin of Wisconsin, who is locked in a close race for the U.S. Senate which CNN has not yet projected.
- Sen. Bob Kerrey of Nebraska, who CNN projected has lost his race for the U.S. Senate.
- Rep. Joe Donnelly of Indiana, who CNN projected has won his race for the U.S. Senate.
- Sen. Sherrod Brown of Ohio, who CNN projected has won reelection.
- Sen. Bill Nelson of Florida, who CNN projected has won reelection.
- Sen. Bob Casey of Pennsylvania, who CNN projected has won reelection.
- Sen. Tom Carper of Delaware, who CNN projected has won reelection.
- Sen. Claire McCaskill of Missouri, who CNN projected has won reelection.
- Former state Sen. Maggie Hassan of New Hampshire, who CNN projected has won the governorship.

Romney is on his way to his election night event site, CNN's Jim Acosta reports.

Maryland upholds same-sex marriage law
By: CNN's Jennifer Rizzo

(CNN) - Maryland voters chose to uphold a new law allowing same-sex couples to marry in the state Tuesday, according to a CNN projection.

The bill legalizing same-sex marriage was signed into law in March by Democratic Governor Martin O'Malley.

We should be hearing from Romney in just about 5 minutes - and Obama soon after that.

Flake, of Arizona, wins Senate seat
By: CNN's Alan Silverleib

(CNN) - In Arizona, Republican Rep. Jeff Flake defeated Democrat Richard Carmona to win a U.S. Senate seat, according to a CNN projection.

Flake, a vocal fiscal conservative, led 51 to 45%, with 57% of the estimated vote total counted, when the projection was made. He will take the seat now held by retiring GOP Sen. Jon Kyl.