Who ran as a third-party candidate in the 1968 presidential election?

George Wallace ran as a third-party candidate in the 1968 presidential election.

Explanation:

The presidential election of 1968 was held on November 5, 1968. Former Vice President Richard Nixon (Republican) won the election, by a narrow difference over Vice President Hubert Humphrey (Democrat).

The election also included the former governor of Alabama, George Wallace, who ran as the candidate of the new American Independent Party. As Wallace's campaign promoted racial segregation, he proved to be a formidable candidate in the South winning 46 electoral votes; no "third party" candidate has won electoral votes since then.

doesn't make any since

explanation:

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.