Donald Trump Is a 'Coward' for Leaving D.C. During Gun Protest Says Gregg Popovich

San Antonio Spurs head coach Gregg Popovich labelled Donald Trump a "coward" after the president opted to leave Washington, D.C. and spend the weekend at his golf club in Mar-a-Lago, while students across the country led marches against gun violence.

Students from Marjory Stoneman Douglas high school who survived the Parkland, Florida, shooting in February, led hundreds of thousands of people in the March For Our Lives demonstration in Washington, D.C. on Saturday.

Similar demonstrations took place in several cities across the country as students rallied to raise awareness about gun violence and demanded stricter firearm laws.

Speaking to Jack Maloney of CBS Sport on Sunday, Popvich said: "[H]ow can the president of the country talk about all the things he's going to do, and then go have lunch with the NRA and change it? It's just cowardice. A real leader would have been in Washington, D.C. this weekend, not at his penthouse at Mar-a-Lago.

"He would have had the decency to meet with a group, to see what's going on, and how important it is, and how important our children should be to us. So for all those politicians involved, it's just a dereliction of duty. The fact that our president left town, is a real indication of how much he really cares about anything other than feeding his insatiable ego."

Asked what impact he thought the marches would have on the future of the country, Popovich praised the students for tackling an issue that politicians have deliberately ignored for far too long.

"There's not one event that is going to signal what it's going to be like in the future," said Popovich. "But I can tell you that I'm sure most everybody is going to be unbelievably proud and excited about those students and what they've done.

"Because our politicians have certainly sat on their thumbs and just hidden. To most, it's almost like a dereliction of duty to watch all these people get killed with guns."

Popovich has previously made the headlines for his stance over race and political issues in the U.S.

Earlier this year, on Martin Luther King's birthday, the 69-year-old said the U.S. still had a lot to do in the fight against racism, and defended LeBron James' decision to speak out against Trump.

Last year, the Spurs' coach described Trump as a "soulless coward" and claimed "you really can't believe anything that comes out of his mouth," adding the U.S. President was a "pathological liar."

Popovich, who compared the rallies to the anti-Vietnam War protests, was not the only high-profile NBA figure to throw his weight behind the marches.

Carmelo Anthony arranged for 4,500 kids to travel from Baltimore to D.C., while Philadelphia 76ers' forward Ben Simmons wore a T-shirt bearing the "March For Our Lives" message before the Sixers' game against the Minnesota Timberwolves.

Golden State Warriors head coach Steve Kerr praised the "the young generation for inspiring all of us and reminding us that change will only happen through our own will."

Donald Trump Is a 'Coward' for Leaving D.C. During Gun Protest Says Gregg Popovich | Sports