Story highlights In a blue wig and garish blue eyebrows, Colbert roamed around the floor of Wells Fargo Center

Colbert's political commentary pervaded every aspect of his act

New York (CNN) And now he takes over the DNC.

After a week at the Republican National Convention, "Late Show" host Stephen Colbert emerged in Philadelphia on Sunday clad as "Hunger Games" announcer Caesar Flickerman, just like how he marked his stay in Cleveland.

2016 Democratic National Convention in Philadelphia, Pennsylvania.

In a blue wig and garish blue eyebrows, Colbert roamed around the floor of Wells Fargo Center engaging passersby, including House Minority Leader Nancy Pelosi.

2016 Democratic National Convention in Philadelphia, Pennsylvania.

CNN's John Nowak tailed Colbert on his first day in Philadelphia.

"The first thing Colbert did was comment on the fact that big banks are an issue, and we're here at the Wells Fargo Center," Nowak said.

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