Stephen Colbert admits that "over the years I have made a lot of fun of Mitt Romney" and maintains "I would do all those jokes again".

However, after Mitt Romney stood as the only Republican Senator to vote in favour of impeaching American President Donald Trump, Colbert takes time in his daily monologue to thank him for his honesty, and commitment to his oath. 

Watch the full episode now - new episodes of The Late Show with Stephen Colbert are available weekdays only on RTÉ Player.