Obtaining a job in a Trump administration will be a major motivating factor for many Republicans. As the possibility of a Trump presidency becomes more real, a larger number of Republicans will make the calculation that if they want to be part of his administration they will need to get off the fence sooner rather than later.
Trump is the kind of person who punishes anyone who stands in his way.
Those officials who come out in the next few weeks and play a role in helping him win some of the bigger states that loom ahead are hoping to be in a good position to be part of the White House should Trump manage to win the election.
Loyalty to party is a powerful force in our current era of polarized politics.