It probably doesn’t do them any favors when they get caught telling lies.
Romney offers some tepid criticism of POTUS: https://www.cnn.com/2018/05/29/politics/mitt-romney-trump-role-model/index.html
Mitt must have washed his own mouth out with soap after that one. Whew!
As expected he did not vote for Trump in 2016. He voted for his wife.
Mitt says he’ll praise the President when he agrees with him, and criticize him when he disagrees. He was more outspoken than I would’ve expected on the family-separation fiasco: https://www.cnn.com/2018/06/26/politics/mitt-romney-utah-senate-donald-trump/index.html
Mitt Romney has, as expected, won his race for the U.S. Senate: https://thehill.com/homenews/campaign/415317-romney-possible-counterweight-to-trump-wins-in-utah