John McCain’s daughter has criticised Donald Trump amid allegations that the President has taken to physically mocking her father, who is stricken with cancer and suffered life-long injuries as a prisoner of war in Vietnam.

Mr Trump has reportedly been imitating the thumbs down motion made by Mr McCain, a Republican Senator for Arizona, when he cast a no vote for his party’s bill to repeal Obamacare in July.

The military veteran is unable to move his arms above his head, the legacy of being shot down over Vietnam, tortured and held as a prisoner for five years.

On Wednesday, Meghan McCain, his daughter, took to Twitter to express her disgust.