Will Democrats block the stock trading ban again after the midterm elections?

Americans do not agree on much these days, but they certainly agree on this: Members of Congress should not get rich trading stocks while writing the very laws that move those stocks.

The failure to ban insider trading in Congress is part of a broader rot now engulfing the swamp. Political corruption, in general, has become a top concern for voters — and for good reason. A new CNBC poll shows, perhaps surprisingly, that it is the most important issue facing the nation: According to CNBC...