Complex sentence: Efforts to impeach Donald Trump have been initiated by members of the United States Congress including Al Green and Brad Sherman, and other people and groups who have asserted that Donald Trump has engaged in impeachable activity during his presidency.
Split into simpler sentences: Efforts to impeach Donald Trump have been initiated by members of the United States Congress including Al Green and Brad Sherman. Other people and groups have asserted that Donald Trump has engaged in impeachable activity during his presidency.