California Governor Gavin Newsom took to the airwaves Tuesday night — with federal troops stationed in his state’s largest city and immigration agents rounding up residents — and warned Americans that democracy itself was under attack from President Donald Trump.

The public fight between California Gov. Gavin Newsom and President Donald Trump keeps intensifying, with name calling, insults and accusations traded over television and social media networks.

Gavin Newsom is hitting Donald Trump with an attack the president and his base know all too well: the president’s mental acuity. Trump and Newsom have squared off over the federalization and deployment of the National Guard to California in the wake of the anti-deportation protests — and some unrest — in Los Angeles.