Hillary’s mental and physical endurance are unmatched in politics. But that isn’t stopping her political enemies from testing a new attack line suggesting she has a brain injury. It’s a Rove redux with a Trumpian twist. 

On August 7, my colleague Melissa McEwan and I launched a nationally trending hashtag, #HillaryCoverageIsCrap. 

The tag is self-explanatory.

As usual, professional trolls hijacked it to attack Hillary, which has been standard operating procedure for the duration of this election. What I found notable is that a significant percentage of these attacks centered on Hillary’s health and used suspiciously similar language and imagery — they appear to be part of a coordinated effort to raise questions about her physical well-being.

I recognize these patterns from my work on John Kerry’s 2004 campaign. I recall flagging increasing chatter about his military record in the months leading up to the infamous “swiftboat” attack. I’m seeing the same thing here. And just as they did with Kerry, the national media are primed to help the GOP launch this cowardly attack against Hillary.

I’m not going to grace these slimy tactics with links; suffice it to say, Hillary is a person of superior stamina and strength. She is steadfast and composed under extreme pressure.

Few people could have endured her 11-hour Benghazi grilling while maintaining anything close to her presence of mind and composure. Nor could they sustain her grueling travel schedule — let alone while under constant verbal assault.

Donald Trump, on the other hand, is clearly rattled by the pressures of the campaign. His behavior has led to all manners of conjecture about his fitness for office. So when he uses “short-circuited” as code to imply Hillary has a health problem, there’s obviously projection going on.

Keep your eye out for this new attack line. Judging from the online buzz, it’s just a matter of time before the national media jump from Hillary’s emails to her health, with no scruples and no ethical boundaries.

Anything to take her down. It’s what they do.

And if you were wondering about the candidates’ steadiness under stress, watch this: