Senator Bernie Sanders, 78, was hospitalized in Las Vegas, Nevada.
Interested in Bernie Sanders?
Add Bernie Sanders as an interest to stay updated on the latest news, videos and analysis from Bernie Sanders from ABC News.
"During an election campaign last night, Senator Sanders had a little chest discomfort. Following medical tests and tests, it was discovered that he had an obstruction in an artery and two stents have been successfully inserted, "said Sanders senior advisor Jeff Weaver on Wednesday in a statement.
"Senator Sanders is conversing and in a good mood. He will be resting in the next few days," said Weaver. "We are canceling its events and appearances until further notice, and we will continue to provide appropriate updates."
Weaver conducted a phone call from all the staff this morning to inform the entire campaign, according to a source familiar with the call.
ABC News first learned from hospital officials of the Vermont senator after his plans to take part in a presidential arms forum changed.
He is one of three seven-year-olds in the Democratic Primary and the oldest. Former Vice President Joe Biden is 76 years old. Massachusetts Senator Elizabeth Warren is 70 years old.
President Donald Trump, who was the oldest elected president, is 73 years old. If elected, Sanders would be the oldest president to serve.
Sanders' last public appearance was at the Las Vegas filming memorial Tuesday night. At the beginning of this week, he was in New Hampshire, where he held seven consecutive events over the course of two days.
Shortly after announcing his presidential campaign in February, Sanders appeared on the campaign track with a bandage on his head after being treated in a walk-in clinic for a minor injury during a campaign in South Carolina in mid-March. Sanders cut the head in the shower, according to the Associated Press, and after receiving half a dozen points, the senator was given a "good health".
Sanders is currently campaigning across Nevada, hosting a town hall on Medicare for All and social security in Las Vegas ahead of his appearance at the Giffords and March for Presidential & # 39; s Our Safety & # 39; s Forum on Wednesday security.
The news of Sanders' admission follows the presidential contender by announcing that he has raised a whopping $ 25.3 million in the third quarter – the biggest quarter for any Democratic candidate this year, and a number that, alone, eclipses 39; whole first and second Warren total of quarters.
Sanders entered his second offer for the president, having run out of Hillary Clinton in the 2016 Democratic primaries, as a known quantity. Despite the presence of another liberal supporter in the race of 2020, Warren, the former mayor of Burlington, continues to carve out a ward in a crowded camp that still has 19 with his straightforward style and progressive ideals – including his signature " Medicare for All "proposal, which was welcomed by many of its democratic rivals and often a key source of debate during the long protest.
Last month, Sanders told ABC's "The View" that 2020 is different because "many of the ideas I talked about," including universal health care, "were perceived as radical," but now " many candidates and most of the American people are in agreement ".
This is a developing story. Check back for updates.