By most accounts, it's the last sort of erection he can manage.

Dana Millbank, in The Washington Post:

Curiously, a certain type of work came up more than once when I searched for a shutdown vocation for Trump. For people who, like Trump, score very low in two attributes — “job requires being sensitive to others’ needs and feelings” and “job requires being honest and ethical” — the database returned a common result: “fence erector.”