What? Why not? You can bring a laser rangefinder to a rally but not a laser pointer?
Here's the Complete Secret Service Prohibited List:
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Aerosols
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alcoholic beverages
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appliances, i.e. toasters
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backpacks, bags, or suitcases exceeding 12'X14"X5"
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balloons
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balls
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banners, signs or placards
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chairs
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coolers
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drones
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e-cigarettes
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explosives of any kind, including firecrackers
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firearms
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glass, thermal and metal containers
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laser lights or laser pointers
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mace or pepper spray
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noisemakers such as air horns, whistles, drums, bullhorns, etc
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packages
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poles, sticks, selfie sticks
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spray containers
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structures
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supports for signs or placards
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tripods
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umbrellas
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weapons
https://wfpg.com/37-items-you-cant-bring-to-trumps-wildwood-rally/