AP on McCain:

Sen. John McCain threatened on Tuesday to cut short a speech to union leaders who booed his immigration views and later challenged his statements on organized labor and the Iraq war.

"If you like, I will leave," McCain told the AFL-CIO's Building and Construction Trades Department, pivoting briefly from the lectern. He returned to the microphone after the crowd quieted.

"OK, then please give me the courtesy I would give you."

Testy.