'Using economics to influence public behavior is something this country is built on--it's called capitalism.'
MICHAEL BLOOMBERG, New York City mayor, who is considering charging people a fee for driving into the heart of Manhattan
'If this Virginia Tech shooter had an ideology, what do you think it was? This guy had to be a liberal.'
RUSH LIMBAUGH, conservative radio host, about Cho Seung-Hui, who killed 32 people in the Virginia Tech massacre, in part to take revenge against wealthy people
'I've been in politics long enough to know that polls just go poof at times.'
PRESIDENT GEORGE W. BUSH, when...