Trump at the end of Year Two

As 2018 ends, President Trump has the support of nearly all conservative voters. Together with congressional Republicans, he has delivered some significant domestic-policy victories for conservatives. But his political coalition, which won him a precarious electoral majority in 2016, is shrinking. As a result there may not be many more victories, and the ones already won are in danger of being evanescent.

Those victories include the confirmation of two conservative Supreme Court justices, one of whom is better grounded in originalist jurisprudence than the justice he replaced and is expected as a result to contribute to rulings that conservatives generally like …