No one should be surprised that U.S. President Donald Trump has made good on his threat to begin withdrawal from the Intermediate-Range Nuclear Forces Treaty with Russia. More surprising is the reaction from some leading Democrats.

It was always a long shot that the administration would succeed in negotiations, begun in December, to get Russia to destroy the missiles they illegally fielded under the treaty. And top administration officials such as National Security Adviser John Bolton have never been big fans of arms control.

Some Democrats, meanwhile, were quick to express their concern. Adam Schiff of California, the chairman of the House Intelligence Committee, said that the withdrawal "risks precisely the sort of nuclear arms buildup that the treaty was designed to guard against." Chris Coons of Delaware, a member of the Senate Foreign Relations Committee, said that withdrawal "without a clear plan for bringing Russia back into compliance will lead to a new arms race and endanger the people of the United States and Europe." Both men, to be fair, also acknowledged that Russia has violated the treaty.