PHILADELPHIA — Some attendees of a liberal conference booed at least twice when House Speaker Nancy Pelosi’s name was mentioned.

The first round of boos came when Oregon Sen. Jeff Merkley spoke about Congress passing a $4.6 billion border bill last month, in a setback for Pelosi. Merkley said Senate Democrats expected the House to go to conference on the bill, but the lower chamber didn’t after a revolt by centrist Democrats.