Living in polarised political climates might be making people physically and mentally unwell, researchers warn.

A study from the US suggests exposure to Trumpism has harmed the physical health of some Americans and subjected them to emotional costs and lost friendships.

About 40% of respondents to online questionnaires, collected about four months after President Donald Trump was voted into power, said politics had made them stressed.

Almost one-third had lost their temper and one in five reported losing sleep, while almost one-quarter had experienced damaged friendships due to political disagreements, the survey showed.