Big-city liberals and their blogging buddies love to paint Tea Partiers as yokels with incoherent candidates and language-mauling signs. (Some have even dubbed their misspellings and grammatical gaffes “Teabonics.”) On some level, this may be true. But there is also a certain hypocrisy to these taunts.

The unpleasant fact that these liberals rarely mention, and may not know, is that large swaths of the Democratic base, groups they need to vote in droves next month — blacks, Hispanics and young people — are far less civically literate than their conservative counterparts.

Therein lies the hurdle for the Democrats: How can they excite this part of the base that is not engaged and knowledgeable in an off-year election? How can they motivate these voters to help Democrats maintain their Congressional majorities when, according to a poll released this week by the Pew Research Center, 42 percent of blacks, 42 percent of Hispanics and 35 percent of voters ages 18 to 29 years old don’t even know that Democrats have a majority in the House? It’s sad. Pathetic, really. But it’s a political reality.