For the sixth time in 11 days, President Barack Obama was back before the cameras Thursday, talking about airline safety and anti-terrorism. He then left quickly for a second White House room to meet with Senate chairmen and press them to have a health care bill on his desk no later than next month. Two very different issues with one common thread: Obama engaging, shedding his famous detachment after watching the intensity of his support drop dramatically since last spring. To get health care, he must be both a broker and a buffer, absorbing the heat for difficult decisions at...