I'm going to talk about dynamics and voting trends more then actual stats, in regards to Hart Trophy chances
What hurts his chances:
1. He just won the Vezina last year, in dominating fashion. I think it would have helped his odds more if he hadn't, and if this season was a bit more of a surprise/shocking then it is. Hart voters will be less likely to throw votes his way then they would have been otherwise I think.
2. The top 4 scorers in the league right now are MacKinnon, Draisaitl, Kucherov, and McDavid. They're the 4 best players. That's who he's competing with in the second half. And because of how good those 4 players are, I could see any of them (or, even all of them) having insane second halves to the season and distancing themselves from Helle (just like Kuch, Mack & McDavid lapped the field last year)
What helps his chances:
1. Despite Mack/Kuch/Drai/McD being top 4 in points, the highest pace among the 4 is only 128 points as of today. Winning a Ross at 128 points after McDavid did 150+, and Mack/Kuch 140+ last year, would be a step down. Voters may look elsewhere (ie a goalie) for Hart votes. (of course - there's the chance any of those 4 up their pace and end up closer to ~140 points again)
2. Winnipeg came out of nowhere. I personally had them a bubble team going into this year. The hockey world in general definitely prefered Colorado and Dallas in the Central, and possibly Nashville. Winnipeg unexpectedly doing so well this year, with Helle at the helm, is a huge argument in his favor.
So - there are some dynamics that play in his favor, and some that hurt him from a hart voting standpoint.
My prediction - I do expect some of the forwards (Mack, Kuch, McD, Drai) to explode in the second half - and at the same time Helle to slow down slightly, so no, I don't think he'll win. But, we'll see how it plays out, it's a fantastic season so far.