Who cares? That's just putting partisanship ahead of patriotism
Nixon had a Republican Congress, too, if I recall right. But eventually they saw the light at the intersection of patriotism and self-interest, and stopped covering for him.
It's ironic that on August 7, 1974, George HW Bush, as RNC chair, drew the short straw and wrote a letter asking Nixon to resign, which he did two days later.