(CNN) Bernie Sanders' heart attack suffered on the campaign trail last week thrusts a tough issue to the front of the 2020 presidential race: How old is too old to be president? But he's not the only candidate in the Democratic field who will be affected by Sanders' heart attack in the race. But with Biden, Warren and Sanders keeping schedules that would exhaust this 43-year-old in about a day's time, there's been little to hang those worries on. While Sanders and his campaign (and his supporters) are quick to downplay how serious (or not) this heart attack was for the Vermont senator, it's hard to get away from this fact: Sanders, a 78-year-old man, had a heart attack that required surgery. While there are lots and lots of people who have this exact experience, most of them are not running for president.

Source: CNN October 07, 2019 18:22 UTC