Hello. I can assist you with your question.
Although many confuse impeachment with a successful conviction, it refers to the actual process, so yes, he was.
Take a look here for more info:
Very thoughtful and interesting question though.
I would say a vast majority of people are not aware of what you just asked.
a 2/3 majority of the senate is required for conviction under impeachment.
Which would be almost impossible to achieve in today's political climate unless there was some egregious violation committed
On which both parties would be forced to agree