WiseGuys has the Gov't Mule presale code: Anyone with this presale code will have a great opportunity to order tickets before the general public. Gov't Mule presale passcode for early tickets in Grand Rapids You don't want to miss Gov't Mule's show in Grand Rapids do you? Tickets will sell out when they go on sale: during the presale you can purchase your tickets before they are all gone.
Here are all the Gov't Mule show details:

Gov't Mule
20 Monroe Live
Grand Rapids, MI
Fri, Nov 2, 2018 07:00 PM

Onsale to General Public
Start: Fri, 08/24/18 10:00 AM EDT

Citi® Cardmember Presale
Start: Wed, 08/22/18 10:00 AM EDT
End: Thu, 08/23/18 10:00 PM EDT

Live Nation/ Mobile App Presale
Start: Wed, 08/22/18 10:00 AM EDT
End: Thu, 08/23/18 10:00 PM EDT

Fan Presale
Start: Wed, 08/22/18 12:00 PM EDT
End: Thu, 08/23/18 10:00 PM EDT
You can use the following presale passwords and information to order your tickets:

Our Passwords are for WiseGuys Members

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Here is a hint: When a presale password is not found in ticketmaster or livenation - check to make sure that the presale is still valid: you could be looking at a very old post, also notice that there might be more than one presale happening - if there are several boxes where pre-sale passwords can be entered you might have to try a couple of combinations to find the right one.