Opinion: Democrats are in danger of going too far left for 2018

NEW YORK, NY – JUNE 26: A banner for progressive challenger Alexandria Ocasio-Cortez hangs across chairs at her victory party in the Bronx after an upset against incumbent Democratic Representative Joseph Crowly on June 26, 2018 in New York City. Ocasio-Cortez upset Rep. Joseph Crowley in New York???s 14th Congressional District, which includes parts of the Bronx and Queens. (Photo by Scott Heins/Getty Images)