An MSNBC host said former President Donald Trump’s cognitive struggles are becoming more obvious by the day — and it’s gotten to the point where he has trouble formulating a coherent policy statement anymore. “If elected, he will be the oldest person to ever be sworn in as President of the United States,” said Chris Hayes on Thursday’s edition of “All In.” “He’s a man that’s suffering from pretty obvious mental decline. But in contrast to the breathless coverage of Joe Biden’s age and fitness … we are not seeing nearly as much discussion about Trump’s diminished mental acuity.” Reporters, no…