Who is Mike Johnson - Republican House speaker? Johnson is a constitutional lawyer who has used his talents to craft some creative — and controversial — theories. The most notable is his role in devising an argument aimed at keeping Donald Trump in power even though he lost the 2020 election. He has consistently opposed abortion, LGBTQ rights and voted against bipartisan legislation to codify same-sex marriage. After he was elected to the position, Trump posted "Congratulations to Rep. Mike Johnson. He will be a GREAT SPEAKER. MAKE AMERICA GREAT AGAIN!"