Biden campaign tests ‘head-to-head matchups’ of Harris against Trump
![Biden campaign tests ‘head-to-head matchups’ of Harris against Trump](https://static.independent.co.uk/2024/07/11/19/GettyImages-2161521138.jpg?width=1200&auto=webp)
Survey comes as president is facing increasing number of lawmakers calling for him to step aside as party’s nominee
Survey comes as president is facing increasing number of lawmakers calling for him to step aside as party’s nominee