Height: Both Tall.
Skin color: Both Brownish
Eye color: Both Blackish
Eye shape: Both Big and Dopey
Nose: Rodman's nose is just plain strange looking. Obama's nose is pretty basic. However, practically the first thing every master of disguise buys with their master of disguise money is an assortment of prosthetic noses. A-la the Pink Panther.
Public Speaking: Rodman pretty much just mumbles. Obama is a gifted orator. For many years, Rodman has shown the ability to surprise people, and I wouldn't put it past him to sharpen his public speaking abilities in order to accomplish his goal of infiltrating the White House. Then again, Rodman's profoundly unpredictable, but mostly lacking motivation throughout his career makes this seem pretty unlikely.
Jump Shot: Both go out of their way to avoid taking jump shots. Even when they're wide open.
Rebounding: Both excel.
Thank you for your time concerning these matters. It is Michael Zinetti's desire to keep all American's safe. It's imperative that we keep our eyes open. You never know when Dennis Rodman is gonna pop up. So, the next time you see Michelle Obama, watch for signs of Rodman-ness. It may save your life.