Sen. Cruz promised to stay out of primaries of sitting Senators. So he congratulated Cochrane. Now, with fraud allegations becoming credible, it is perfect timing for him to intervene to criticize unethical conduct and potential fraud. He never seems to misstep.
There was an article posted the day out the run-off (I’ll have to dig it out later) in which Cruz was apparently having second thoughts about his deal with McConnell and Ayotte, after the way the GOP-E behaved in Mississippi.