Donald Trump is blaming the feds for shunning the Constitution to keep him muzzled. On Friday, the former president’s attorneys accused special counsel Jack Smith and his team — who accuse him of hoarding classified documents and obstructing their return — of demanding he be gagged by the court without offering “any evidence of threats or harassment resulting from President Trump’s protected speech.” They chastised the gag order request as an unconstitutional attack on the 2024 presumptive Republican nominee as a way to buttress incumbent President Joe Biden’s effort to secure a second term, C…