Washington DC, June 5 -- In the latest battle between American business tycoon Elon Musk and US President Donald Trump, Elon Musk called out Trump for ingratitude as the two disagreed on the latest US bill.

Speaking to the media, CNN posted the remarks of US President Donald Trump, who said, "Elon and I had a great relationship. I was surprised... I'm very disappointed with Elon. He knew this bill better than anyone, and he only developed a problem when he found out I would cut the EV mandate because that's billions and billions of dollars, and it really is unfair."

He said they would like all types of cars--gasoline, combustion, and hybrid. "We want to be able to sell everything. He (Elon) knew every aspect of the bill; he knew it bett...