Barack Obama 'worried about Joe Biden carrying on' as calls to quit mount after Putin gaffe
![Barack Obama 'worried about Joe Biden carrying on' as calls to quit mount after Putin gaffe](https://i2-prod.irishstar.com/incoming/article33161786.ece/ALTERNATES/s615/1_obam.jpg)
High profile Democrats have called for Joe Biden to step aside in the upcoming Presidential election after he mistakenly called Volodymyr Zelensky 'President Putin'