Zohran Mamdani spoke at a rally in Harlem as he sought to build on momentum from New York City’s Democratic primary. Mamdani ...

His liberal politics, inspired by the safety nets of the New Deal, were shaped in working-class mining country.

It was a primary race that pitted competing visions for the Democratic Party against one another, and in the end, the New York progressives emerged victorious. They now believe they have the momentum ...