WASHINGTON (AP) — Pressure is mounting on Bernie Sanders to end his campaign for president. Democratic Party leaders are raising alarms that his continued presence in the race is undermining efforts to beat presumptive GOP nominee Donald Trump this fall.

The new concerns come after Sanders’ recent wins over front-runner Hillary Clinton in Indiana and West Virginia.

While those victories have provided his supporters a fresh sense of momentum heading into next week’s primaries in Kentucky and Oregon, they did almost nothing to help Sanders cut into Clinton’s nearly insurmountable lead in the delegates who will decide their party’s nomination.

Democratic Sen. Dianne Feinstein says Clinton hasn’t been able to pivot to the general election in the way that she should.