Congress can not count Trump's votes tomorrow, and Harris would become president.

[ColinC]

This article by two Supreme Court clerks was written a couple weeks ago in The Hill. Congress does have the power to stop Trump from becoming president if they fulfilled their constitutional duty to prevent an insurrectionist from holding office.

https://thehill.com/opinion/congress-blog/5055171-constitution-insurrection-trump-disqualification/

To make an objection under the Count Act requires a petition signed by 20 percent of the members of each House. If the objection is sustained by majority vote in each house, the vote is not counted and the number of votes required to be elected is reduced by the number of disqualified votes. If all votes for Trump were not counted, Kamala Harris would be elected president.

The plain wording from the 14th amendment:

No person shall be a Senator or Representative in Congress, or elector of President and Vice-President, or hold any office, civil or military, under the United States, or under any State, who, having previously taken an oath, as a member of Congress, or as an officer of the United States, or as a member of any State legislature, or as an executive or judicial officer of any State, to support the Constitution of the United States, shall have engaged in insurrection or rebellion against the same, or given aid or comfort to the enemies thereof. But Congress may by a vote of two-thirds of each House, remove such disability.

https://constitution.congress.gov/constitution/amendment-14/

Congress can and should block Trump from becoming president, since the constitution is clear about the fact he is unqualified to hold office. If we are going to be purists and honor the electoral college despite a candidate losing the popular vote because the constitution is clear about the rules, we can and should keep a winning candidate from holding office, again, because the constitution is clear about the rules: an insurrectionist is unqualified to receive electoral college votes and congress must not count those votes he is ineligible to receive. The alternative would be for congress to allow an insurrectionist to hold office with a 2/3rds vote. There is no other constitutional way about it.