Kevin C. Cox/Getty ImagesThe NFL appears to be digging in and preparing for a war with President Donald Trump. During a rally in Alabama on Friday, President Donald Trump criticized NFL players who protest the national anthem, saying he wished NFL owners would "fire" the players and say "Get that son of a b---- off the field right now." On Saturday, several NFL teams released official statements condemning the comments, backing their players, and seemingly prepping for a drawn-out social media battle with Trump. NFL commissioner Roger Goodell responded first, saying Trump's comments showed an "unfortunate lack of respect for the NFL." A short while later, several NFL teams followed suit with strong statements, several of which came directly from the owner of the team. From San Francisco 49ers CEO Jed York: "The callous and offensive comments made by the President are contradictory to what this great country stands for.