I'm confident Peters will win but Land is really hitting the airwaves hard. Peters will only win by a handful of points when it's all said and done... kind of reminds me of Ohio Senate 2012.
So is Peters. Land is pumping more cash into the airwaves because that is quite literally her campaign strategy--buy a bunch of airtime, avoid public appearances, and cross her fingers hoping to win. Peters is actually making campaign stops.
Rasmussen only polled Michigan a few times in 2008 and 2012. Their final polls of the Presidential race underestimated Democratic support by mid single digits, and underestimated Debbie Stabenow by about 8-9 points.
Literally every other poll is showing Peters up by high single digits. I'll go with the crowd on this one.