How is he the "first impeached President" if he has not been impeached?
Your argument is nonsensical!
I'm not a fan - but the people seem to have spoken.
The house process is only the preliminary / investigative phase. The Senate is the Judgement phase.
The judgement is - INNOCENT AND ACQUITTED.
The facts remain: there is no "popular vote" in the Senate. All 50 states are represented equally, and the majority ruled INNOCENT.