How can presidential candidates be so silly?

WASHINGTON — If California Sen. Kamala Harris is elected president in 2020 and reelected in 2024, by the time she leaves office 114 months from now she might have a coherent answer to the question of whether Americans should be forbidden to have what 217 million of them currently have: private health insurance. Her 22 weeks of contradictory statements, and her Trumpian meretriciousness about her contradictions, reveal a frivolity about upending health care’s complex 18% of America’s economy. And her bumblings illustrate how many of the Democratic presidential aspirants, snug in their intellectual silos, have lost — if they ever had — an aptitude for talking like, and to, normal Americans.