Johnson was elected to Congress in 2016, making him the most junior lawmaker in decades to become speaker. He may also be the most conservative. As an evangelical Christian, Johnson is the former chairman of the Republican Study Committee, and has sponsored legislation which effectively bars the discussion of sexual orientation or gender identity for those below the age of 10 at any school which receives federal funds.
Johnson also served on former President Trump's impeachment defense team.
In the coming weeks, Johnson faces several challenges - including a mid-November deadline to pass a measure to fund the government and avert a shutdown yet again. He'll also need to navigate the House through the Biden administration's $105 billion funding request for Israel, Ukraine and the southern US border.
Johnson has notably opposed more funding for Ukraine.