Is this the beginning of the end of the Trump administration?

[Grumpier Than Uncle Joe]

~Six months from now, will there be any Democratic Senators calling on Trump to resign, and who will they be?

I think you left out the word "not" here.

I think people are getting ahead of themselves here.  Right now, AFAIK, no prominent Democrats are calling on Trump to resign.  They're calling for an investigation.  "Investigation" can last for months/years, so it's not clear to me how far things will have actually advanced by the fall of this year.

Things move quickly in the Trump era

Including the markets..........The Dow closed at another all time high.