President Obama takes a shot while playing basketball with children during the annual Easter Egg Roll on April 1, 2013 on the South Lawn of the White House in Washington, D.C. Obama wants Dems to take a shot at the midterms.(Mandel Ngan/AFP/Getty Images)

Democrats get "clobbered" in midterm elections, President Obama said Thursday, and urged the party's base to get to the polls in November.

Addressing a Democratic Congressional Campaign Committee fundraiser in Miami, Obama said politics in Washington have become "so toxic" that people lose faith in government.

"And finally they just say, you know what, I’m not interested, I’m not going to bother, I’m not going to vote," he said.

Obama has been trying to warn Democrats about the danger of losing midterm elections since the summer, when he started hammering the point home at Democratic fundraisers.

Obama told the audience Thursday that a "more representative cross-section" of people vote during presidential elections.

"But in midterms we get clobbered -- either because we don’t think it’s important or we’ve become so discouraged about what’s happening in Washington that we think it’s not worth our while," he said.

In Miami he gave a special shout-out to House Minority Leader Nancy Pelosi (D-Calif.), who was in the audience, reiterating that he wants to see her keep her seat after the November elections.

Obama said he believes Pelosi "will go down in history as one of the greatest speakers in our history," and she "is as tough and principled and as visionary as any member of Congress that we've ever seen."

Obama also continued with his basketball-themed week: the fundraiser was held at the home of former NBA star Alonzo Mourning.