Shades of Watergate?

I know everyone else who follows politics in even a cursory way is buzzing about the firing of James Comey as FBI director.  The common and not very convincing analogy being employed is the famous "Saturday Night Massacre" of Watergate fame.  For those of you who did not live through it, President Richard Nixon fired special prosecutor Archibald Cox as he was closing in on Nixon's complicity in the Watergate coverup.  This occurred after Attorney General Elliot Richardson and his deputy William Ruckelshaus resigned rather than  carry out Cox's firing.   The investigation of Watergate was much further down the road than Comey's investigation of Trump's ties to Russia. The congress was controlled by Democrats in Nixon's time, so there was no cover to be had by his administration and within a few months, he was gone.  Trump, on the other hand, has a republican controlled congress which is prepared to do nothing unless presented with evidence which would implicate them in a coverup if they did not act on it.  The wheels will continue to turn and the FBI investigation will eventually be completed.  I doubt Trump thought this through and either his closest advisors also did not or were afraid to tell him firing Comey was likely to increase public pressure for the investigation to intensify.   They all badly underestimated the blowback.   I doubt there is any appetite for an impeachment of the president, even if the Russia investigation reveals collusion between tRump's campaign and the Russians.  However, the continued drumbeat of bad news will severely limit the amount of damage the GOP can do in the next couple of years.  I hope...