GS, No I would vote for any of the Republicans down the ticket so yes they would lose the house and the senate too! I know in my family and friends I have talked to all tell me the same thing that they would be so mad at the GOP for taking down the vote of the people that they would not vote for any GOP on the ticket and only vote for Trump. I believe that it is about 40 to 50% of the voters think this way by all the forums and blogs I am a member to.
The GOP are close on the senate tickets and very easily can lose if they do a third party move. It will be the end of the GOP power and they may not even get there third party dictator in office and even if they do the people will not be with him or her and the senate may be lost. Big gamble and for what, so they get what the voters do not want?