Isaac has weakened to a tropical depression after drenching southeast Louisiana and causing flooding.
Isaac's maximum sustained winds decreased to near 35 mph Thursday and was expected to gradually weaken.
That rate is much lower than the numbers used in the horrifying projections that shaped the government response to the epidemic.
The Clemson psychology lecturer and 1996 Libertarian vice presidential candidate got 51 percent on the fourth ballot.
The ruling says the state's top health official exceeded her statutory authority by ordering "nonessential" businesses to close.
She sees government COVID-19 restrictions as "the biggest assault on our liberties in our lifetime."
Cohen, who had been linked with parodist Vermin Supreme, identifies as an anarchist.