Today is Primary Election Day in Michigan. I checked out the location of my polling place through publius.org, and showed up a little past 8AM this morning.
If you are able to vote in Michigan, then go and do so. Polls close at 8PM today. Just remember that it is a partisan ballot, meaning that you can only vote for one party's candidates throughout the entire ballot. For example, you cannot choose a Republican for state representative and then a Democrat for governor. You can only choose candidates from one party across all primaries.