Congress can choose to impeach, but they are not doing so based on the laws of the land, but based on their own determination (whether it is in their best interest for that President to be gone or not), which (unsurprisingly) is split along political lines (which is why it's so hard to actually impeach the president).
Therefore impeachment is not a means to hold a President accountable for illegal or anti-democratic actions, but rather it is a means for a united Congress to have some power over the President in the event he managed to piss off enough people from both parties.
Congress can choose to impeach, but they are not doing so based on the laws of the land, but based on their own determination (whether it is in their best interest for that President to be gone or not), which (unsurprisingly) is split along political lines (which is why it's so hard to actually impeach the president).
Therefore impeachment is not a means to hold a President accountable for illegal or anti-democratic actions, but rather it is a means for a united Congress to have some power over the President in the event he managed to piss off enough people from both parties.