Andrew Marr asks former UK ambassador John Bolton why he thinks Donald Trump has picked a vice president who he previously called 'America's Hitler'.

Trump first appeared onscreen backstage before emerging to God Bless The USA surrounded by security.

He wore a bandage on his right ear where he was hit during the Pennsylvania shooting on Saturday.

It comes after the former president announced Ohio Senator JD Vance as his Republican running mate and wouldbe vice president.

Chants of "JD, JD, JD" rang out throughout the Republican convention following Trump's announcement.

Writing on his social media platform Truth Social, he said: "J.D. has had a very successful business career in technology and finance, and now, during the campaign, will be strongly focused on the people he fought so brilliantly for, the American workers and farmers in Pennsylvania, Michigan, Wisconsin, Ohio, Minnesota, and far beyond."

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