That’s called “jointness,” about which Hegseth knows little. He touted his Army background in the National Guard as a qualification to be secretary of Defense, but just as different cultures, goals and methods divide allies in a coalition, they also divide military branches.

The Senate on Friday night voted to confirm Pete Hegseth as defense secretary after Vice President JD Vance stepped in to cast the tiebreaking vote. Hegseth’s nomination had been hampered by allegations of misconduct.

Readers criticize the vote on the defense secretary nomination. Also: President Trump and tariffs; silencing health officials; firing of inspectors general; longevity.