The list of witnesses that Republicans provided to Democrats in the House Oversight Committee included people such as Alexandra Chalupa, who the Republicans wanted to call in order to push a de-bunked conspiracy theory from a Russian disinformation campaign and Hunter Biden who weren't really witnesses to the matter at hand The Republicans were trying to change the subject to unsupported conspiracy theories that Ukraine had interfered in the 2016 election and to the Bidens . Of course, the Democrats weren't going to allow that.