Limbaugh trains his sights on McCain
Conservative radio host ratchets up attacks, but to what end?
By Jacques Steinberg
The New York Times

updated 11:23 p.m. ET, Thurs., Feb. 14, 2008

Rush Limbaugh took his show on the road this week, forsaking his main broadcast studio in Palm Beach, Fla., for one in Midtown Manhattan. But the change of scenery did nothing to dampen the Republican-on-Republican smackdown he has been waging from afar against Senator John McCain, the party’s likely presidential nominee, whom Mr. Limbaugh considers too moderate.

As he opened his radio program Wednesday, Mr. Limbaugh lobbed yet another grenade.

“I would like today to announce a tentative decision — I’m still thinking about it — to endorse Barack Obama,â€