Sen. Sherrod Brown, D-Ohio, joined Democrats calling on President Biden to drop out of the 2024 race on Friday evening. "At this critical time, our full attention must return to these important issues. I think the President should end his campaign," he said in a statement on X. 3RD DEMOCRAT SENATOR CALLS ON BIDEN TO STEP ASIDE AS PRESSURE ACCELERATES According to Brown, "Over the last few weeks, I’ve heard from Ohioans on important issues, such as how to continue to grow jobs in our state, give law enforcement the resources to crack down on fentanyl, protect Social Security and Medicare from cuts, and prevent the ongoing efforts to impose a national abortion ban." "I agree with the many Ohioans who have reached out to me," he added. VULNERABLE DEM TESTER CALLS ON BIDEN TO DROP OUT AFTER GIVING SCHUMER HEADS UP Brown is the fourth Democrat senator to press Biden to step aside and the 34th Congressional Democrat to do so. The Ohio Democrat is in a particularly competitive race in November, where he will face Republican Senate candidate Bernie Moreno, who is endorsed by former President Trump. Non-partisan political handicapper the Cook Political Report rated the Ohio Senate race as a "Toss Up," placing it alongside races in Montana, Nevada, and Michigan. 'THEY'RE INCOMPETENT': SEN MARSHALL BLASTS 'WORTHLESS' SECRET SERVICE BRIEFING ON TRUMP ASSASSINATION ATTEMPT In a statement, Moreno responded to Brown, saying, "If Joe Biden is unfit to run, he is unfit to serve." "I am formally calling on Joe Biden to resign the Presidency because his continued presence in the situation room is a national security threat. I hope Senator Brown will join me." "Make no mistake, Brown was fully aware of Joe Biden's mental decline, covered it up, and used Biden as a vessel to pass the most liberal agenda in American history," he claimed. SECRET SERVICE ‘CHECK-THE-BOX’ SENATE BRIEFING LEAVES QUESTIONS: ‘INFURIATING’ Brown was the third Democrat senator in just 24 hours to urge Biden to step aside, signaling a movement that is picking up its pace. Despite this, Biden and his campaign have remained adamant that he is not backing down. Prior to the Ohio Democrat's announcement, Sen. Martin Heinrich, D-N.M., called on Biden to pass the torch as well. On Thursday evening, Sen. Jon Tester, D-Mont., made his own plea to Biden to exit the race. Earlier this month, Sen. Peter Welch, D-Vt., became the first Democrat senator to make the request of the president, doing so in an op-ed for the Washington Post. Both Heinrich and Tester are similarly up for re-election in November. Get the latest updates from the 2024 campaign trail, exclusive interviews and more at our Fox News Digital election hub