Morris is correct.
IF they take action before the ballots are counted.
But nobody should expect any government entity in the US to toss out hundreds of thousands of ballots anywhere under any circumstances once they have been counted.
“Stop counting now” is precedent that has been established.
And so far, no court and no state legislature has given such an order.
Article II
Section 1
US Constitution
The executive Power shall be vested in a President of the United States of America. He shall hold his Office during the Term of four Years, and, together with the Vice President, chosen for the same Term, be elected, as follows
Each State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors, equal to the whole Number of Senators and Representatives to which the State may be entitled in the Congress: but no Senator or Representative, or Person holding an Office of Trust or Profit under the United States, shall be appointed an Elector.
Nowhere in that does it say anything about limiting how the legislatures determine the electors. They can do whatever they want.