Skip the investigations, win the election

At a certain point, you have to realize you can’t hit a fastball. House Republicans don’t quite get that they are hopeless at oversight hearings. They keep losing — and now the chairman of the House Oversight Committee has just introduced articles of impeachment against IRS Commissioner John Koskinen.

I’m sympathetic to the GOP motive, given how the Obama IRS has consistently obstructed and misled Congress in the tax-exemption scandal. But impeachment is no ordinary move. No agency chief or Cabinet officer has been impeached since 1876. And even proponents...