The Michigan poll is junk, Clinton has a wider lead there
Ohio finally looks a little encouraging
Iowa looks like a tough one for Team Blue because every poll is in the margin of error there so they all can't be wrong
If I'm remembering right, Iowa polling in 2012 was also quite close. Obama still won it by 6.
Iowa polling in 2014 was also quite close. Ernst still won it by 8.
Don't expect a 2014 electorate in either of those states.
...Michigan usually is close in polls going into the Conventions but then slams the door on the Republicans in Presidential years. This is normal for a Democratic blowout in November as not-so-likely voters come to vote in November.
Ohio more D than either Iowa or Michigan? That does not usually hold.