Howard Dean is the former head of the DNC. He called the Tea Party “the last gasp of the generation that has trouble with diversity" ... i.e., racists. He said "you have all had friends of different races, different religions, and different sexual orientations, and you all date each other, that is not how I grew up. That is not how the tea party grew up. The tea party is almost entirely over 55 and white" ... i.e., racist. His group, Democracy for America, sent out an email calling the "Tea Baggers" "extremists" with a “weirdly racist tinge”.
Current DNC Chair, Tim Kaine, called the "the tea bag party" "corrosive and divisive" while at the same the New York Times reported that the White House was planning an all out ad campaign to create the impression that the Republican party was now being led by Tea Party "extremists". Kaine stated that he sees as the Tea Party's "extreme agenda" is reflected in the beliefs of most of the GOP House leadership. It doesn't take a genius to see that he was trying to hang the racism charges that democrats far and wide, and in the mainstream media, had leveled against the Tea Party on the GOP's door.
House Majority Leader Steny Hoyer and Speaker Nancy Pelosi referred to the Tea Party movement's protests as "un-American". Pelosi even said this:
http://www.youtube.com/watch?v=oRCq7mv7HVM
You be the judge whether she was referring to nazis.