>It didn’t help the Apollo program that Richard Nixon was president at that time. He had no enthusiasm for it because of its association with President Kennedy. The result of course was it was shut down after only 6 flights.

The peak year for Apollo funding was 1967. The budget was already being cut before Nixon even took office. He didn't help things but you can't lay the blame solely on him. By the time Apollo 13 flew, housewives were complaining about Apollo coverage pre-empting their soap operas. Too many people saw the later Apollo missions as more of the same. People lost interest very quickly, and without strong public support, you won't get the political support necessary to maintain a big budget item.