Interesting question. We were just at the George Washington Masonic Memorial in Alexandria 2 days ago. There have already been many presidents that were Freemasons. The first was George Washington, the most recent was Gerald Ford. In between include: James Monroe, Andrew Jackson, James Polk, James Buchanan, Andrew Johnson, James Garfield, William McKinley, Theodore Roosevelt, Howard Taft, Warren Harding, Franklin Roosevelt, and Harry Truman.
Abraham Lincoln applied before he became president, but withdrew the application because he thought it would look political. He withdrew his application and promised to reapply after he left office. They made him an honorary Freemason after his death.
Lyndon Johnson made it to First Degree, but no further. Ronald Reagan and George Bush, contrary to popular belief, were not Freemasons.
If we elect a Freemason president, he would be in good company. Many of our greatest presidents held those values.