The number of confirmed novel coronavirus cases world-wide more than doubled in a week to nearly 330,000 on Sunday, as President Trump ramped up federal assistance to New York, California and Washington, the three states hardest hit by the outbreak in the U.S.

Mr. Trump announced the assistance at a White House press conference as U.S. lawmakers failed to reach a deal on Sunday on a potentially $1.3 trillion federal stimulus package to address the coronavirus emergency and the economic fallout. The sweeping legislation hit a stumbling block when Democrats blocked a procedural vote in the Senate.

Mr. Trump said he was optimistic a deal would still be reached after saying that he had ordered the Federal Emergency Management Agency to supply New York, California and Washington with thousands of hospital beds. The federal government would also provide the three states with hundreds of thousands of masks and surgical gowns, and deliver more respirators to them.

The president on Friday approved a major disaster declaration for New York, unlocking federal funding and assistance for the strained state. On Sunday he approved the same declaration for Washington and California.

“Our goal is to get relief to Americans as quickly as possible,” he said.