The protesters were chanting their opposition to a Republican healthcare measure, which they say would cut back on protections given to people with disabilities under Obamacare.
Trump complained that past American leaders allowed China to make hundreds of billions a year in trade, but that China isn't helping control North Korea.
Republican finger-pointing commenced Friday after the Senate's dark-of-night defeat of the GOP effort to repeal much of the Obama health care law, a startling blow to President Donald Trump and congressional leaders.
U.S. Senate Republicans narrowly agreed on Tuesday to open debate on a bill to repeal Obamacare, but the party's seven-year effort to roll back Democratic President Barack Obama's signature healthcare law still faces significant hurdles.