Mr. Siegel has so far shown a sharp change from the aggressive leadership style of his predecessor, Mr. Logan.

WSJ: Social Media

Alex Castellanos, a Republican strategist and CNN contributor, conceded Obama "won tonight on points, no doubt about it, " but added that Romney showed the leadership style of a commander-in-chief to demonstrate that making a change in the White House would be safe.

CNN: Campaign enters final stretch as Obama takes final debate