March 15 has largely been considered the date Bernie Sander's campaign finally picks up momentum. It's when the remainder of her best states (save for maybe NY? another aware of other big states for Clinton?) vote. A lot of analysts have suggested Bernie could gain traction after March 15, but that never mattered, because by that time it'd be too late.
If this is the showing for Michigan NOW, prior to when he was still supposed to be absolutely wiped off his ass... It's a tell. So was Kansas to be quite honest (70% was humongous).
Considering Bernie really only started gaining real attention and traction this past December, results have shown that the longer he stays in the race and the more exposure he gets, the more favor he earns.
What's the current pledged delegate count between Clinton and Sanders? I can't find a single site that provides them without the superdelegates and I was just able to find this information last week. GRRRR.