NPR's Lourdes Garcia-Navarro says protesters don't just want Dilma Rousseff gone: They are demanding the ruling party be booted as well. Some estimates say 1 million people protested across Brazil.
Today's meeting in Switzerland comes a week after 47 Senate Republicans signed an open letter to Iran suggesting any deal reached would lapse the day President Obama leaves office.
The St. Louis County Police Department announced the arrest on social media. A news conference announcing the details of the arrest was scheduled for 2:30 p.m.