There are good arguments against President Trump’s foreign policy. North Korea, for example, retains its nuclear weapons program and is moving towards a resumption of long-range missile tests. China continues to consolidate its control over the Pacific Rim. Iran is readying a nuclear breakout. Vladimir Putin is heartened by the partisan impeachment battles over Ukraine.

These are issues that the 2020 Democratic presidential hopefuls should jump on to offer serious alternatives. But they didn’t. And that’s a deep shame.