Trump’s triumph

DURING its 160-year history, the Republican Party has abolished slavery, provided the votes in Congress to pass the Civil Rights Act and helped bring the cold war to a close. The next six months will not be so glorious. After Indiana’s primary, it is now clear that Republicans will be led into the presidential election by a candidate who said he would kill the families of terrorists, has encouraged violence by his supporters, has a weakness for wild conspiracy theories and subscribes to a set of protectionist and economically illiterate policies that are by turns fantastical and self-harming.The result could be disastrous for the Republican Party and, more important, for America. Even if this is as far as he goes, Mr Trump has already done real damage and will do more in the coming months. Worse, in a two-horse race his chances of winning the presidency are well above zero.