One could say either no border wall or failed Obamacare repeal.
On the one hand, there were allegations that Republicans were withholding support expecting Trump to be ousted or resign. The opposition to a border wall might fall here.
On the other hand, Obamacare repeal was held up by McCain for personal spite, which existed no matter what might happen.
-PJ
Those failures should be draped entirely around the necks of the Republicans in Congress. They earned them on merit. The GOP has no interest in repealing Obamacare or protecting our borders.