US tensions with two key trade partners amped up on Monday after President Trump doubled tariffs on steel and aluminum and the US pushed countries for deals ahead of looming deadlines. China responded to Trump's claim on Friday that it has "totally violated its agreement" with the US,

The twists and turns in U.S. President Donald Trump's tariff policies have not only rattled global financial markets but have also taken investors on a roller-coaster ride. Companies are counting the cost of the trade war that is now being estimated at more than $34 billion in lost sales and higher expenses,