Standing in front of the U.S. Capitol and under a beautiful blue sky this morning, Senate Democrats made the easiest argument in the world. Led by Sen. Bernie Sanders, 21 Democrats announced their support for a bill raising the federal minimum wage to $15 an hour.

While the big push has little chance of becoming law while Republicans control the White House, the rally gives Senate Democrats a chance to score populist points with their base. An hour away in Baltimore, Democratic Mayor Catherine Pugh hasn’t enjoyed that opportunity.