University funding on ice, Istanbul mayor detained, Amtrak CEO resigns & more

President Donald Trump agreed to help Ukraine during a call with the country's president. The Trump administration has placed one university's federal funding on hold. We're following new developments on a Palestinian activist detained by immigration authorities. A key rival to Turkey's president has been detained. Plus, a major shakeup at Amtrak.  Learn more about your ad choices. Visit podcastchoices.com/adchoices