Conservatives mocked Democratic New York Rep. Alexandria Ocasio-Cortez after she cited her high school science fair in a Twitter spat with Texas Republican Sen. Ted Cruz. Ocasio-Cortez kicked off the exchange by criticizing President Donald Trump’s decision to name Vice President Mike Pence as the head of the Coronavirus task force, saying that he did not believe in science. Cruz quickly responded by asking the freshman congresswoman a series of scientific questions that were at odds with her ideology — including a query about Y chromosomes. Ocasio-Cortez responded with a few insults and her resume — and among the scientific...