Bernie Sanders heads to Iowa to campaign for ex-staffer

Sen. Bernie Sanders is heading to Iowa for the first time this year, spawning speculation that he might, again, throw his hat in the ring for the Democratic nomination in 2020.   Sanders, according to the Des Moines Register, will be stumping for his former aide Pete D’Alessandro, who is now running for U.S. Congress in the state's 3rd District. When running in the Democratic primary in 2016, S...