I'm not going back to look if this was brought up already, but while people fight over what exactly was said by whom about domestic travel restrictions, note that the CDC changed its quarantine recommendations for people who are fully vaccinated (scroll down on the linked page to the section "Public Health Recommendations for Vaccinated Individuals" for the complete breakdown:
Find interim clinical considerations for the use of COVID-19 vaccines for the prevention of coronavirus disease 2019 (COVID-19) in the United States.
www.cdc.gov
To summarize, if you have a known exposure to someone with COVID-19, but are greater than two weeks out from finishing your vaccine series (but less than 3 months), AND you do not have symptoms, you no longer need to quarantine.
I wonder if the next step will extend to eliminating state travel quarantines for people who are fully vaccinated.