Isaacman became the first private citizen to conduct a spacewalk. But his longstanding ties with Elon Musk's company SpaceX raise possible conflicts of interest.
A new Boston University study of 77 deceased male ice hockey players found that their chances of developing the degenerative brain disease known as CTE increased with each year they played the sport.
Pete Hegseth is fighting to keep his nomination on track after a series of negative reports about his past behavior — including a damning email his mom sent him during his second divorce.