Every time the NFL wades into political waters, it’s an absolute dumpster fire. You would think owners, players, and the NFL itself would learn the best policy concerning politics is to simply shut up and focus on sports. Unfortunately for one Arizona Cardinals fan this past Sunday, one employee from her team just couldn’t just do that since she supports former President Donald Trump. KPNX reports Susan Rosener — a season ticket holder and fan of the historically moribund Cardinals for years — attended Sunday’s game dawning her black MAGA hat. That is, until a security guard stopped her sayi…