Latest poll: Hillary's big lead over Sanders

According to a CNN poll released today, Hillary leads Bernie Sanders by 18 points. 

Kevin Drum:

Today CNN released the results of its polling on the Democratic race, and they have it at 42 percent for Hillary Clinton vs. 24 percent for Bernie Sanders. Joe Biden is at 22 percent, but no one even knows if he's running yet, so take that with a big grain of salt. When he's excluded from the poll, Hillary leads Bernie by 57 percent to 28 percent. In other words, if Biden officially drops out, it's a big win for Hillary Clinton...In any case, I suppose this will all get lost in the mix amid Xi-mania and pope-mania. There's always some excuse, isn't there?