Question

why did president nixon resign? congress was going to impeach him. he was about to lose the election. he was involved in an amnesty scandal.

Answer 1

Actually it is because Congress was going to impeach him.

Step-by-step explanation:

Its tricky because the other answer has the word scandal in it, but the better answer is that Congress was going to impeach him because of the watergate scandal.

Answer 2

he was involved in an amnesty scandal aka Watergate scandal