President Biden has had little trouble getting even his most controversial nominees confirmed. Democrats, including Montana Senator Jon Tester, have all voted in unison. Only Neera Tanden, Biden’s pick to head his budget office, faced bipartisan opposition. But with David Chipman’s nomination to head the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) possibly being determined by a single vote, Senator Tester continues to refuse to say how he will vote. Chipman, like Biden’s judicial nominees, is a radical gun control supporter. Yet, Tester appears to not wanting to upset national Democrats and is waiting until his vote no longer...