Here's the US Pledge of Allegiance I believe Donald Trump would like all Americans to make, though so far he's had enough sense not to articulate it directly:
I pledge allegiance to the USA, one nation over God, deeply divided, with liberty and justice from the top down.
I can't imagine Trump really gives a damn about the American Flag, which is just a symbol, but he does believe the federal government has the right to define what "God" is and how "He" should be worshiped. He knows his power depends on American citizens being divided into warring political, economic, and social classes. And he believes that "rights" are just entitlements granted by people in power to those under them.
My own suggestion for a Pledge of Allegiance is:
I pledge Allegiance to the American Democratic Republic, one nation under law, with liberty and justice for all.