SINGAPORE (Reuters) -Asian equities and U.S. stock futures slid on Monday as anxiety over tariffs and criticism of the Federal Reserve by President Donald Trump shook investor confidence, pushing the dollar sharply lower and catapulting safe-haven gold to a record high. Trump launched a scathing attack against Fed Chair Jerome Powell on Thursday, with his team evaluating whether they could fire Powell, a move that would cast doubts about the central bank's independence and further erode faith in U.S. assets. "Markets are already on edge due to escalating geopolitical tensions, and now concerns are rising that Trump's potential interference with the Fed could add another layer of uncertainty," said Charu Chanana, chief investment strategist at Saxo in Singapore.