The president touted progress in the talks, and said he was hearing "good reports" from his negotiating team in London.

Trump called for the arrest of California’s governor. U.S.-China trade talks resumed in London. Government scientists signed an open letter decrying Trump’s health policies. What happened: More than 90 NIH staffers signed a letter of dissent to Director Jay Bhattacharya, calling recent changes and budget reductions “harmful measures.”

The U.S. delegation sounded upbeat about the progress made on the first day of trade talks with China in London. President Donald Trump, meanwhile, was cautiously optimistic as his officials resumed negotiations on Monday.