Donald Trump gets burned by 13-year-old girl on America's Got Talent

It takes the honesty of a child to call out Trump's presidential run as a joke

Republican presidential candidate Donald Trump shields his eyes as he speaks during a rally at the Fox Theater, Wednesday, June 15, 2016, in Atlanta (AP)

Donald Trump's transformation from reality TV star to presumptive Republican presidential candidate has struck many commentators as somewhat ridiculous.

Yet it has taken the honesty of a 13-year-old girl to call it out as a full-blown joke.

Lori Mae Hernandez appeared on America's Got Talent this week with a stand up comedy routine about how she was underqualified to be a babysitter.

And after a nervous start in which she explained how she got into comedy to make her ill father laugh, she soon won over the audience.

She said: "My only qualification to be a babysitter is that I used to be a baby. That's crazy. That’s like saying, ‘Hey, you’re sick a lot, you want to be my doctor?'”

It was her last line, though, which got the biggest laugh - and at the expense of a man who, in just a few months' time, could be the most powerful in the world.

For the latest on Mr Trump's election bid, click here.