The most recent is a short video of Senator Ben Cardin of Maryland. He was elected to the Senate last November, after serving in the House of Representatives for the Baltimore area since 1986. Aged 23 he was elected to the Maryland House of Delegates, and became its Speaker before election to the House of Representatives.
In this video he discusses the challenges and opportunities of being a Senator, making some interesting contrasts between the two Houses.
The video can be seen at