There are a couple of polls indicating Kasich doing well, but they seem to be outliers, most have Trump up by a fair amount.

Via NY Post:

Donald Trump and Hillary Clinton command huge leads in Michigan — races key to any hopes of catching the presidential front-runners, pollsters said.

In the GOP battle, Trump holds 42-percent support among Wolverine State Republicans, far ahead of Ohio Gov. John Kasich at 19.6 percent, Ted Cruz with 19.3 percent and Marco Rubio at 9 percent, according to the poll commissioned by Detroit station WJBK-TV.

There are 59 GOP delegates, distributed proportionately, at stake in Michigan.

Kasich – from neighboring Ohio – needs to do well in Tuesday’s Michigan primary to build momentum going into next week’s winner-take-all battle in the Buckeye State.
On the Democratic side, Clinton leads Bernie Sanders, 66-29. Even if Sanders doesn’t win Michigan, he’ll have to improve on this score in a state that should be more receptive to his economic populist message.

The poll was taken on Saturday afternoon.