Democratic presidential candidate Sen. Bernie Sanders, I-Vt., accompanied by Rep. Brendan Boyle, D-Pa., right, and others, speak on labor issues Thursday in Washington.
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., accompanied by Rep. Brendan Boyle, D-Pa., right, and others, speak on labor issues Thursday in Washington. Lauren Victoria Burke AP
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., accompanied by Rep. Brendan Boyle, D-Pa., right, and others, speak on labor issues Thursday in Washington. Lauren Victoria Burke AP

Defying conventions, Sanders emerges as a Clinton challenger

June 19, 2015 08:32 AM