Democratic senator and former combat pilot dismisses billionaire who wrote ‘You are a traitor’ after Ukraine trip

Elon Musk is “not a serious guy”, said Mark Kelly, the US fighter pilot and astronaut turned Arizona Democratic senator, after the Tesla owner and close Donald Trump ally called him a “traitor” for visiting Ukraine in support of its fight against Russia’s invading troops.

On Sunday, Kelly posted to social media photos of his visit and a lengthy statement.