In actions, nothing has really changed much. It's more transparent now, but we have increased social media exposure, too. In words, it's quite clear that everyone in the country needs a good verbal thrashing by Emily Post. I was there in the 60's, btw. Sure there were slogans and such but those were NOT being voiced by anyone with pretensions to political power, much less a member of Congress. If any representative or senator had dared to disrupt a presidential address with 'You lie' he would have been firmly frogmarched out by the Secret service. It simply would not have occurred to public figures to be so completely lacking in basic manners. I can recall a whole lot of US smugness over our legislative process vs. that of the English Parliament and most of us kids (we were kids at the time) were struck by how rowdy the House of Commons can get when we got to see a bit of it on tv. *shakes head*

So essentially politics have not really changed but manners sure as hell have. Our Founding Fathers, hell, our grandparents would consider 2011's political 'speech' worthy of a trip to the woodshed with Dad's belt, to be honest.