Trump’s travel ban takes effect, LA protests escalate, and more happening in politics

President Donald Trump’s new ban on travel to the U.S. by citizens from 12 mainly African and Middle Eastern countries took effect Monday amid rising tension over the president’s escalating campaign of immigration enforcement.

Meanwhile, scores of scientists at the National Institutes of Health sent their Trump-appointed leader a letter titled the Bethesda Declaration, a frontal challenge to policies they say undermine the NIH mission, waste public resources and harm people’s health.