There's this perception that all liberals drink tea with their pinkies up, hate hard work, and just spout intellectual nonsense from overpriced cafes while living off of trust funds and working cushy jobs where they don't do a thing to stimulate the economy.
The perception of the "feeble liberal" is one that is celebrated by conservative outlets, as is the idea that they're elitists and out of touch with the common man. Something that many people feel Trump utilized in his campaign against Hillary Clinton.
Trump isn't the only elitist to bash elitism, however. Conservative talking head, Ann Coulter, is known to say a thing or two to equate liberalism with elitism.