No, but WI, MI and MN are in play. Probably NH.
Michigan Wisconsin and Minnesota are not in play.
We don't know that. If this Iowa result is right, then theu are in play along with Pennsylvania, while Ohio is safe Trump.
Iowa is not an indicator of any of those four states--the demographics are completely different. Iowa has more in common with Kansas than it does PA/WI/MN/MN.
Not to mention the farm crisis which left a generation of Iowans unnaturally Democratic. The state is just going back to normal.