Ken Paxton, the Attorney General of Texas who filed this particular lawsuit, has also been recently accused of federal crimes[0], so ingratiating himself with somebody who can (and does) hand out federal pardons seems like a win-win proposition, especially if all the costs for the lawsuit are footed by Texas taxpayers.

[0] https://edition.cnn.com/2020/10/04/politics/ken-paxton-texas...