Let me say, I know nothing about marijuana, he said.

But on the other hand, its the wrong signal at this time.

Thats wrong, Nixon said.

(Original Caption) Washington, DC. President Richard Nixon makes victory speech at a rally shortly after being elected to serve a second term by a landslide in the November 7th Presidential election.

President Richard Nixon makes victory speech at a rally shortly after being elected to serve a second term in 1972.Bettmann Archive

Nixons decision also hampered progress on research over the therapeutic potential of marijuana through the last five decades.

Without quite endorsing it, he suggested he supported the decriminalization of marijuana.