Alex Brandon/AP
- Kevin McCarthy said President Joe Biden has an age problem.
- "There is a real concern here," McCarthy said as he remarked on Biden's ability to effectively lead.
- As the 2024 race heats up, the advanced ages of the leading presidential candidates have become a major issue.
Former House Speaker Kevin McCarthy said Tuesday during a CNBC interview he had "a real concern" about President Joe Biden's ability to effectively interact with foreign leaders, shining another spotlight on the debate around the president's age ahead of the 2024 election.