Firearms are allowed at the rally (with exceptions).
Open and concealed carry (with a CPL) are allowed outside the Capitol building. Concealed carry with a CPL is allowed inside the Capitol building. Long gun carry is banned within the Capitol building.
Guidelines and laws
Michigan has different laws for those with a concealed pistol permit (CPL) and those without one. This will serve as some suggestions and some explanations of the various laws in this regard.
If you have a CPL you can carry your handgun either concealed or openly in/at the capitol. You can also carry firearms inside of the legislators' offices in the capitol, the Romney building and the Farnum building.
Handgun transport without a CPL
750.231a (d) To a person while transporting a pistol for a lawful purpose that is licensed by the owner or occupant of the motor vehicle in compliance with section 2 of 1927 PA 372, MCL 28.422, and the pistol is unloaded in a closed case designed for the storage of firearms in the trunk of the vehicle.
(e) To a person while transporting a pistol for a lawful purpose that is licensed by the owner or occupant of the motor vehicle in compliance with section 2 of 1927 PA 372, MCL 28.422, and the pistol is unloaded in a closed case designed for the storage of firearms in a vehicle that does not have a trunk and is not readily accessible to the occupants of the vehicle.
Any person 18 years and older that can lawfully possess a firearm can openly carry a long gun or a handgun (Handgun must be lawful for that person) in/on capitol grounds. Firearms are also allowed on public streets and sidewalks.
Bars and restaurants
Some people may want to have lunch or dinner in one of the many businesses in downtown Lansing. For those that don’t have a CPL, you CAN NOT possess a firearm in any place that has a liquor license unless you have permission from the owner or agent of the business and then only if you open carry.
A great overview of these laws is the Michigan State Police Legal Update #86 which can be found here.
For more information on Open Carry go to http://www.miopencarry.org/faq