This Labor Day, I stand with every worker who has lifted our nation to new heights – and with the unions who gave them power and voice. Workers built America. It's my job to make America work for them. And I won't let them down.

NEW: Sen Amy Klobuchar to NBC News: Sen Menendez should resign. "Yes, he should resign. But he has said he won't, so that's why I've called for the Senate investigation--the Senate ethics investigation to begin immediately separate & apart from the ongoing criminal case."