Ill manners

This is just rude:

Republican presidential candidate John McCain cut short his first public appearance without running-mate Sarah Palin after chanting supporters of Democratic rival Barack Obama interrupted his speech.
After lunching with a roundtable of women at Philadelphia's Down Home Diner, McCain shook hands with supporters and strode up to a podium to deliver a statement. But as he spoke, chants of "Obama, Obama, Obama” filled the room.

When have Republicans ever done this?