WASHINGTON (AP) -- The chairman of a House committee investigating the alleged Secret Service prostitution scandal is predicting more firings, but lawmakers and President Barack Obama's top campaign adviser are expressing confidence that the agency will effectively deal with the incident.

House Homeland Security Committee chairman Peter King says "every possible lead is being examined" in the case. King says he's baffled by the alleged behavior, telling NBC's "Meet the Press": "What they were thinking is beyond me."

So far, six agents have lost their jobs while another six are being investigated along with 11 members of the military.

Appearing on ABC's "This Week," Sen. Susan Collins of Maine says she wonders whether having more female agents as part of the Secret Service team in Colombia might have kept the incident from taking place.

Obama campaign adviser David Axelrod calls the alleged behavior disturbing, but tells CNN's "State of the Union" that the misdeeds of a few individuals should not tarnish the overall work and reputation of the service.