What was the constitutional issue and/or amendment that related to the bush vs gore case?

In the circumstances of this case, any manual recount of votes seeking to meet the December 12 "safe harbor" deadline would be unconstitutional under the Equal Protection Clause of the Fourteenth Amendment. Florida Supreme Court reversed and remanded.

the constitutional issue was that the manual re-counting of votes trying to meet the December 12th deadline was unconstitutional under the Equal Protection Clause of the 14th amendment

d. it adversely affected american productivity