Colbert Interviews Rush Holt, NJ Senate Hopeful, And Things Get Awkward (VIDEO)

If members of Congress need further reason to avoid going on "The Colbert Report," look no further than Senate hopeful Rush Holt's interview with Colbert for his "Better Know a District" segment, in which Princeton, New Jersey is profiled.

Holt, who's going head-to-head with Newark's Mayor Cory Booker in the state's Democratic primary Tuesday, doesn't appear to be quite prepared for Colbert's curveballs. Perhaps most notable was his response to Colbert's question about why he thought it was important to defeat the man who would be New Jersey's first black senator.

Check out the interview above, where Colbert interviews the current New Jersey state representative, physics professor and five-time "Jeopardy!" Rush Holt, and then challenges him to a thumb war.

WATCH: Part 1