Arizona’s Senior U.S. Senator John McCain is among the prominent few Republicans attending the invitation-only Experts and Enthusiasts Summit in Park City, Utah.

For the second year in a row, Donald Trump turned down an invitation to attend the annual E-2 Summit, hosted by 2012 presidential nominee Mitt Romney.

At last year’s summit, Romney led the “Never Trump” movement.

This year, Arizona and South Carolina senators John McCain and Lindsey Graham are Trump’s most vocal GOP critics.

Not all are publicly critical of the President and not all are politicians.  Besides House Speaker Paul Ryan, former CIA Director Mike Morrell and Dow Chemical CEO Andrew Liveris are confirmed to attend.

However, Leveris and summit guest FedEx CEO Fred Smith condemned Trump’s decision last week to pull out of the Paris Climate Accord.

Former Vice President and Democrat Joe Biden said he also will attend the four-day summit to help foster open communications between parties.