Removal from office requires 67 Senators to vote “guilty”.
No one knows what percentage of the population is necessary to get there, but it is probably >70%.
What the Democrats achieved in 1973-74 was a coordinated attack on Nixon that sold impeachment to the same public that gave Nixon 61% of the popular vote in 1972.
Who among contemporary GOP leaders in Congress could pull that off?
100% media Watergate blitzkrieg, artillery barrage, carpet bombing, day after day, week after week, month after month - repeating the same phrases over and over and over: “stonewall” - “modified limited hangout” - “18 minute gap” - “What did the President know and when did he know it?” - all that stuff... it finally worked.
You could have every GOP leader shouting for impeachment - and get nothing. No coverage. And from Joe Public? Apathy.