"Sorry, can't make out what you are trying to mumble with your foot jammed so firmly in your mouth."
Here ya go tiger. Here's one hint for you - military obligation. There are others. 
I know you're Canadian and can't help but make feeble attempts to display your fictitious superior intellect but bi-monthly visits to the U.S. to shop and spending winters in FL doesn't make you an expert on all things American-much less U.S. immigration - sorry. But you can always impress your buds at morning coffee club at Timmie's.
https://www.uscis.gov/us-citizenship/citizenship-through-naturalization/guide-naturalization