Wisconsin Senator Ron Johnson expected to run for reelection

Wisconsin Republican Senator Ron Johnson is expected to run for reelection and kick off his campaign next week, according to a source familiar with his decision.

For months, the incumbent Republican declined to say whether he would seek a third term in the U.S. Senate. He is one of former President Donald Trump's staunchest allies in the chamber. 

Johnson was first elected to the office in 2010 as part of the Tea Party wave that swept across the country during the midterm elections. He once pledged to only serve two terms in the U.S. Senate but told the Milwaukee Journal Sentinel last month that he was facing pressure to run again in 2022.