It was one of the states that was able to keep the same number of congressional districts from the previous census (in the past, Oklahoma has had as many as nine House of Representatives seats). Following the 2018 elections, a Democratic challenger ousted a Republican incumbent, changing the congressional delegation to a 4-1 Republican majority.
It was one of the states that could maintain the same number of congressional districts as in the previous census (historically, Oklahoma has had up to nine House of Representatives seats). After the 2018 elections, a Democratic contender defeated a Republican incumbent, altering the congressional delegation to a 4-1 Republican majority.