Trump said that "instead of talk", he is going to ask protesting players to suggest "people that they think were unfairly treated by the justice system".
Ali was sentenced to five years in prison in 1967 for refusing to be drafted into the Vietnam War, but he did not serve any prison time after winning an appeal.
Ali was convicted in 1967 of draft evasion. The president said football players have "seen a lot of abuse" and "a lot of unfairness" and that he wants their input on his use of this executive power. The U.S. Supreme Court overturned his conviction in 1971.
Eden Hazard hopes Belgium will be 'different' to England's Golden Generation
Martinez raised eyebrows by slotting Laurent Ciman into skipper Kompany's No. 4 shirt and keeping him on for 90 minutes. Belgium will play one more friendly against Costa Rica on June 11 before opening group play against Panama on June 18.
Pippa Middleton confirms she is pregnant with her first child
She added to Waitrose Kitchen magazine: "This being my first pregnancy, I had so many questions I felt were still unanswered". The illness led to her being admitted to hospital, cancelling engagements and missing Prince George's first day of school.
Paris rain halts Rafael Nadal's momentum with Diego Schwartzman a set up
I think this is too good of an opportunity for Thiem to pass up. "We'll see what can I do against the king of clay". Del Potro is into the semifinals at Roland Garros for the second time, having lost to Federer on the stage in 2009.
"And he wasn't very popular then", Trump said as he left the White House en route to the G7 summit in Canada. "I'm thinking about Muhammad Ali, I'm thinking about that very seriously".
Last week, Trump pardoned conservative filmmaker Dinesh D'Souza.
The former Cassius Clay died in 2016 at the age of 74 due to septic shock brought on by a respiratory illness.