If Donald Trump is serious about seeking the Republican nomination for president, he may find himself running with little support from the party’s powerful economic conservatives. Trump has been a vocal advocate in recent weeks for a 25 percent tariff on all Chinese imports, a proposal that influential conservative activist Grover Norquist calls “the worst kind of pandering.” “The tariffs or the tax increases are what politicians call for when they’re expressing contempt for the American people’s intelligence,” Norquist, the founder of Americans for Tax Reform, told The Daily Caller. “Tariffs are not paid by Chinese people, they are paid...