I think impeaching him NOW would be an excellent idea as it would make it painfully obvious that impeachment bears no correspondence whatsoever to one's ability to be an effective and good president, for anyone who still thinks it does.
Absolutely.
Impeachement is entirely a political decision.
Congress can elect to impeach anyone for any reason.
No evidence of crimes or misdemanors are necessary.
And if Congress elects NOT to impeach, no amount of crimes or misdemeanors are enough to force them to impeach, either.
That's why the courts have absolutely nothing to do with it.
BY CONSTITUTIONAL LAW, the courts have no say in the impeachment process.