He does not care. He is a politician and that is it. He has his fed retirement and perks. He can go back to Texas and enjoy the ranch and hang out with the fat cat oil execs.
I think he main interest in running a second time was to show his father that he could do it and make a legacy for his family.
Since he won re-election a second time, I think his agenda switched directions. No longer does he need or care about the conservative base or the Republican Party future. All he is interested in is serving the interests of his peers, e.g. allowing as much cheap foreign labor as possible in here to be exploited by outfits like McDonald’s, Wal-Mart, etc.