The decision by Ms. Ramos, a state senator from Queens, is at odds with her frequent criticism of Andrew M. Cuomo, including comments questioning his “mental acuity.”

In an extraordinary about-face, back-of-the-pack mayoral candidate Jessica Ramos is endorsing her front-running rival Andrew Cuomo — just weeks after questioning his “mental acuity”

State Sen. Jessica Ramos turned her back on fellow progressive mayoral candidates Friday — making the shocking move to endorse frontrunner Andrew Cuomo despite previously questioning his mental acuity.