This is your brain on Reagan

Last night's debate at the Ronald Reagan Presidential Library was packed with a predictable array of Gipper tributes, homages, and nostalgia from the four remaining Republican presidential candidates.

But John McCain held back from repeating one of the most audacious claims he has made to win over Reagan sentimentalists: last week in Tampa, McCain suggested he was ready to reenlist the most famous veteran of the "war on drugs" for another surge.

"It would be good to have Nancy Reagan back in the leadership role of the 'Just Say No' program," he said, when asked by a reporter what he would do to fight drugs and gangs as president.