PHOENIX -- U.S. Sen. John McCain faced a tough crowd largely opposed to military action in Syria during a town hall meeting Thursday in Phoenix.

The Republican senator repeatedly told about 150 constituents at the morning meeting that there would be no plans to send U.S. troops to retaliate for the chemical weapons attack last month near Damascus.

"I want to begin by saying to you I am unalterably opposed to having a single American boot on the ground in Syria," McCain said. "The American people wouldn't stand for it.