[So he had to do it right now and just for this guy? ]
The only reason this is coming up is because Lewandowski was a big shot in Trump’s campaign. Senators endorse a lot of people. A good chunk of it is noise, and nobody highlights it. For the NH primary, though, Cruz’s endorsement is the seal of approval for hard right (low tax, strong military, low immigration) voters. Whether this will be decisive for O’Brien is unclear, but it’s definitely a help in a race where he’s up against a general and Trump’s anointed.