Anyone can choose to do as they please as long as it does not involve violating human rights.
BUT, doing anything you please must be according to universal truths, applicable to all for all time.
Violating any of these is easy; anyone can steal, lie, back bite, marry non muslim men, but it does not make it right.
Quran says do not marry non believing men for a reason.
Maybe the president knows there are no true muslim men anyway so why the hypocrisy!