whatever powers Fed Gov't might have or bring to bear over State Executive and Legislative gov't is VERY limited to put it mildly

Please read my response to him below.

The idea is to challenge what some Governor's are doing, not strong arm them or force them into doing something different. The author wanted to point out that Trump's current medical staff is lacking and that by picking certain scientists whose models would challenge the current ones, governors would be able to form better conclusions, and keep in mind quite a few of the governors have based their opinions on such research. While Trump would have no right to force governors to go along with him, he does have every right to assemble his own medical science team that could possibly offer better models, a medical science team that of which governors of the states would also listen to in order to decide on the next course of action.