What is the concept behind a republic?
The republican system of governance can look quite similar to the democratic style, but there is a very fine line between the two. A republican government is one where the nation is considered as a “public matter” and not the private property of a singular ruler or family. In a republic, the citizens of the country vote to elect representatives who take part in the proceedings of the government and pass various laws.
The United States is an example of a republic. The country is divided into different federal constituencies (states), such as California, Arizona etc. and each of these holds separate elections to elect leaders representing their state. Most of the representatives are affiliated to some political party, and the party with the most elected representatives forms the government.
https://www.scienceabc.com/social-science/democracy-vs-republic-whats-the-difference.html
Thank you for your definitio of “Republic.”
There is no federal legal path to do a rerun of the 2020 election. But each and every state can opt to do a re-run of its part of the November 2020 election and send a new set of electors to a special session of Congress. All of the red states could do this but Democrat states would not.But it sure would be interesting.