I would be interested in if those in attendance are able to get a vague idea (based on his non-answers) of what his options are going forward... Is he really considering a run for Pres... or is he considering something more like Governor, Senator, VP, or potential Cabinet if a Dem wins in 2020, etc. (he doesn't seem to have a poker face... so his big grin will probably give a good idea of the answers)
According to this:
https://uselectionatlas.org/FORUM/index.php?topic=233345.msg5415359#msg5415359he seems to think his choices are either 1) run for POTUS or 2) run for county judge, and hold that job for a few terms before running for governor some time in the 2020s.
But yeah, as for Cruz's Senate seat, as noted elsewhere in the thread, it's Juaquin who appears to be eyeing that seat, not Julian.