No Americans will be kneeling during the US National Anthem but no one is stopping you.
Maybe no kneeling, but at least 2 have already pre-emptively said they will pass on their White House visit because of Orange Man Bad derangement syndrome.
Cute, sorry I offended you.
She knelt twice in 2016 (Seattle game, and a USNWT game), and calls herself a walking protest to Trump... but will not be allowed to kneel during the World Cup.