Trump who? Lawmakers are calling Elon 'President Musk', here's why

Why is Elon Musk being referred to as 'President'? A few Democrats and even Republicans are referring to Elon as 'President Musk' and Donald Trump as 'Vice President'. This comes at a time when Elon Musk threatened to oust the Republicans who who votes to extend government funding should be voted out of office.