Will he be impeached and if so when? One of the most important factors in the impeachment of a president is the Vice President. If Spiro Agnew had remained Vice President, Richard Nixon would have never faced impeachment.
If you impeach the President, whoever is to step into his shoes, will highlight different agendas for Republicans and Democrats.
For the Democrats the answer is easy. They don’t want Pence. He is a real conservative who would be harder than Trump to attack, and more dangerous to the social issues that are dear to their heart .
Wait till after the midterms when they may well win the House and Senate. Given the results of the last election those Democrats who stayed home will be highly motivated.
Given the relationship between Trump and Pence, it is not hard to imagine that investigations will find the VP tainted with the sins of the Trump campaign and administration.
If the Democrats are successful in impeaching both Trump and Pence, then the Speaker of The House, in this scenario a Democrat, would become President.
The Republicans have their own set of problems. They would prefer Pence. Their problem is the President is popular amongst Republicans. To force him out would alienate a lot of voters they need. Can they wait till the mid terms? Risky.