Last week, the Hill ran an article titled “Polls suggest Sanders may be underestimated,” observing that Bernie Sanders “is firmly entrenched in the race’s top tier of candidates” along with Joe Biden and Elizabeth Warren. This isn’t actually news — polls showed Bernie in first place before Biden announced, and he’s been runner-up in most polls since. What’s news is that Elizabeth Warren has joined the top tier. A Monmouth poll released today actually shows Warren and Sanders tied for the lead, followed closely by Biden.

Biden’s increased exposure has left him vulnerable to popular discovery that he’s mentally muddled at best — an impression so widespread that it prompted him to plead, “I’m not going nuts.” Meanwhile, Warren and Sanders both continue to rise. It’s starting to look like these three may soon be locked in a dead heat.

The differences between Sanders and Warren on the one hand and Biden on the other are obvious. Biden has no idea what he wants the country to look like or why he’s running for president. Warren and Sanders do. But the differences between Warren and Sanders continue to confuse many in the mainstream media, who repeatedly assert or imply that they’re ideologically identical.