It's about McCain's lame-assed judgment...the crowd ate it up:
Campaigning Saturday in Ohio, Obama shied away from directly criticizing the newest addition to the Republican ticket, reflecting a campaign strategy to refrain from direct attacks on Palin. Instead, surrogates went on the offensive against Palin.
"Barack Obama and John McCain had one major test of their judgment" in the campaign, said Sen. Sherrod Brown (D-Ohio) at an evening rally in Dublin, Ohio. "John McCain chooses someone who is a mayor of a town of 7,000 people, then was elected governor, has been governor of a state for 18 months, a governor of a state that has half the population of Franklin County and yet she is going to be a heartbeat away from president."
The crowd, which booed at the mention of Palin, began yelling: "No way!"
"No way, no way is right," Brown said. "On the other hand, in his first exercise of good judgment, Barack Obama chose Joe Biden… John McCain's 26 years in the U.S. Senate certainly hasn’t helped him build good judgment."
http://www.politico.com/news/stories/0808/13015.html