It's called Constitutional precedent you willful idiot. IN order to have an impeachment inquiry, the House has to have a floor vote. It is meaningless when it is held secretly behind closed doors excluding members of the opposition party.
You can flail and cry and lie all you want asshat, but those are the FACTS. The President has just called the House's bluff by sending them a letter that there will be ZERO further cooperation until they have that vote and provide real subpoena's in lieu of Media intended demand letters.
Trump will see this all the way to the Supreme Court. The Democrats shall not turn this nation into a lawless Fascistic third world shit hole and disenfranchise half the voters in the country because Fascistic Democrats refuse to accept the results of a Presidential election.