That would be all Congressmen .... House & Senate.
Remember both the House and Senate will convene to accept the slate of electors from each state. Once the process begins each state in alphabetical order will present to the joint session their slate of electors, at which point anyone can object, when there will be (if I understand this part correctly) a separate session of each house to find a resolution to the objection. Now I do not understand what happens. Is only a majority enough to proceed and what if one house does not agree with the other etc. The possibilities are 3. They either reject the state slate and reject any slate, reject the state slate and accept the alternate slate, or finally accept the slate sent by the states. In the first two VP Biden would not have enough electoral votes on Jan 6 to get 270 votes nor would Mr Trump. It would therefore go to the House which has a Republican majority of states 26-23 (one state is split) and ergo, presuming the Republican states would vote for Mr Trump, he would continue to be occupant of the WH.
To me this is scary sheis. This would essentially be voter nullification. How can I even be typing these words ... and people still be oblivious!!!
If you got the crazy ... you're probably a Republican
Here’s what the Constitution says: Article II, Section 1 Para 3.
The electors shall meet in their respective states, and vote by ballot for two persons, of whom one at least shall not be an inhabitant of the same state with themselves. And they shall make a list of votes for each, which list they shall sign and certify, and transmit sealed to the Seat of Government of the United States, directed to the President of the senate. The president of the senate shall, in the presence of the senate and house of representatives, open all the certificates, and the votes shall then be counted. The person having the greatest number of votes shall be the president, if such number be a majority of the whole number of electors appointed…
Now some of that was changed by the 12th amendment.
The 12th basically made the vote for the President and Vice President. Thus preventing a tie for the presidency as was the case with Jefferson and Burr along with other minor changes such as instead of taking up the top 5 electoral vote receivers, it cut it down to 3.
Unless I missed something, the constitution specifies the president of the senate will count the certified results. No where does it give the senate nor the house authority to challenge the certified results. Only in case of a tie or if no candidate has received a majority of the electoral votes does the House become involved in choosing a president, the senate the vice president.
I suppose the bottom line is the actual vote of electors take place in their states on 14 Dec and is then certified. The certified count is then sent to the President of the senate by the 23 Dec. Who counts them on 6 Jan 2021 and the new president takes office on 20 Jan.
There is no provision in the Constitution for rejection. At least that I can find either in the main document or in the amendments by the senate or the house.
It's high past time that we start electing Americans to congress and the presidency who put America first instead of their political party. For way too long we have been electing Republicans and Democrats who happen to be Americans instead of Americans who happen to be Republicans and Democrats.