Obama the best Republican campaign surrogate?

Probably no surprise here: Asked Thursday who their best surrogate has been, the Republican official said President Barack Obama.

The Democrat named former President Bill Clinton and former Secretary of State Hillary Clinton.

Rob Collins, executive director of the National Republican Senatorial Committee, and Guy Cecil, executive director of the Democratic Senatorial Campaign Committee, appeared together Thursday at a Politico Playbook lunch and answered questions for about an hour.

Republicans need a net gain of six seats to win control of the Senate, and Obama’s sagging popularity has been a big boost.

Both agreed, though, that a lot of races are too close to call. “We are at the razor’s edge of who is going to control the majority,” said Cecil.

He cited the three closest races as Georgia, Colorado and Iowa, while Collins named New Hampshire and North Carolina.

The biggest surprise so far has been Georgia, Cecil said. Democrat Michelle Nunn is in a tight race with Republican David Perdue for the seat now held by Sen. Saxby Chambliss, R-Ga.

Collins named Sen. Kay Hagan, D-N.C., who’s in a battle with Republican Thom Tillis, as a weaker than expected candidate. Hagan, Collins said, is “hiding behind a bigt pile of money.”