WI: Nixon has a Normal Presidency

[DSS]

Two PODs involved here:

1) Spiro Agnew avoids the bribes as Governor of Maryland. His accepting those bribes led to his resignation from the vice presidency in October 1973, so if he had a "clean" governorship, he would not have resigned.

2) No Watergate, or as far as the public knows.

So, with both of these PODs in mind, let's assume the first term of Richard Nixon as president goes exactly like OTL, and Nixon/Agnew is re-elected in a landslide over George McGovern in 1972. However, the Watergate scandal is avoided, and Nixon and Agnew serve a full second term as POTUS and VPOTUS.

1) What would have happened in a Nixon second term without Watergate?

2) How does the '76 election turn out? Does Spiro Agnew run for POTUS? If so, what happens to Ronald Reagan? Does Jimmy Carter run, and win the Democratic nomination?