Senator Stern

Senator Stern is the minor character in Iron Man 2 and became the minor antagonist of Captain America : The Winter Soldier.

He's portrayed by Garry Shandling.

Iron Man 2
Senator Stern was in the hearing with Justin Hammer and Tony Stark. But Tony knows Justin Hammer and Stern's secrets, so he loses in the hearlings.

When Hammer called to Ivan Vanko, Stern was playing golf with Justin Hammer.

Later Tony and Rhodey defeated Ivan Vanko, he gaved the decoration to Tony and Rhodey.

Captain America : The Winter Soldier
After Stern left the hotel with Jasper Sitwell, They gave a hug each other, and Stern says to Sitwell "Hail, Hydra."

Black Widow and Nick Fury uploaded the HYDRA's Secrets, than Stern was arrested.