White House hopeful Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) will take part in the Oct. 15 primary debate after undergoing a procedure this week to have two stents inserted to address an arterial blockage.

Sanders’s campaign Thursday confirmed to The Hill that the 78-year-old Vermont lawmaker will participate in the Ohio event, which will also feature 11 other Democratic presidential contenders.

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Campaign aides said Wednesday that Sanders underwent the procedure after experiencing chest discomfort during a campaign event on Tuesday and that he would spend the next few days recovering from the procedure.

“Sen. Sanders is conversing and in good spirits,” Jeff Weaver, a senior adviser to Sanders's campaign, said in a statement. “He will be resting up over the next few days. We are canceling his events and appearances until further notice, and we will continue to provide appropriate updates.”

The campaign also confirmed it was postponing a $1.3 million television ad buy in Iowa that was slated to begin airing Thursday.

The debate later this month will feature 12 candidates taking the stage at Otterbein University in Westerville, Ohio, just north of Columbus.

Sanders will be near center stage, right next to former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE.

Sanders’s procedure has underscored the age of the primary field’s top contenders. Biden is 76 years old, while Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) is 70.

Allies of the Vermont senator have insisted he’s in good health, often pointing to the energy he shows during his packed campaign schedule.