WASHINGTON (Reuters) -The tattered bromance between Republican President Donald Trump and his main campaign financier Elon Musk took another fractious turn on Saturday when the space and automotive billionaire announced the formation of a new political party, saying Trump's "big, beautiful" tax bill would bankrupt America. A day after asking his followers on his X platform whether a new U.S. political party should be created, Musk declared in a post on Saturday that "Today, the America Party is formed to give you back your freedom." "By a factor of 2 to 1, you want a new political party and you shall have it!" he wrote.