Mike Pompeo | KNKX

Mike Pompeo

Updated at 3:00 p.m. ET

President Trump announced Secretary of State Rex Tillerson was fired on Tuesday morning in a tweet that followed a year of frequent tension between the two leaders.

Mike Pompeo, a Republican congressman from Kansas and Donald Trump's pick to run the CIA, is no stranger to Russian intrigue.

After graduating first in his class from West Point in 1986, he headed to Europe. There, according to his official bio, he served as a cavalry officer, "patrolling the Iron Curtain before the fall of the Berlin Wall."