Members of Congress, or MC [1]. The UK (and other parliamentary governmental) analogue is MP -- Member of Parliament. The term fell out of favor in the US, but

Members of Congress, or MC [1]. The UK (and other parliamentary governmental) analogue is MP -- Member of Parliament. The term fell out of favor in the US, but nonetheless exists. [1] https://en.oxforddictionaries.com/definition/mc https://en.oxforddictionaries.com/definition/mc