That would almost be fun to see. I wonder how long it would take to clean up the mess they made.
It's good to remember that impeachment is simply bringing charges against a sitting president. Then the process moves to the Senate which would hold the trial. Conviction by the Senate is required to affect the presidency. So far, two presidents have been impeached. However, neither was tried by the Senate and neither left office as a result.
If Trump is impeached, Pence becomes President.
Pence pardons Trump and appoints him Vice President.
Pence resigns, Trump becomes President and appoints Pence as his Vice President.
Liberal heads explode.