Before she left Congress last winter, the former Democratic representative Tulsi Gabbard introduced two bills: one restricting abortion; the other, banning trans women from participating in women’s sports. The bills, which had no chance of passing, nevertheless sent a message: the onetime darling of the Bernie Sanders appeared to leave Congress intent on cultivating a right-wing following. Now her move to the right is just about complete. Gabbard, appearing on Fox News channel’s Hannity in November 2021, declared that the Democratic Party’s social-spending bill, known as Build Back Better, was part of a deeper problem. The government was “too powerful...