Stephen Colbert Officially Announces Run for Presidency

After nearly a solid week of dropping hints, Stephen Colbert threw his hat in the ring in the race for president.

First, he made a surprise appearance at his old home, Comedy Central's "The Daily Show," Tuesday night to make an official announcement: He was officially considering a run for president and would announce his decision "some time soon."

Soon arrived about 20 minutes later on his own show, The Colbert Report, when, with balloons falling, he said, 'Yes, I'm doing it!" Then he welcomed CBS political analyst Jeff Greenfield to analyze his impact on the race "in the past three minutes."

Greenfield said it was "astounding."