However many times I come here it's hard not to feel impressed standing in front of the White House.

For the two presidential candidates there are very few moments left to ensure that they become the next inhabitant of this historic building.

One of them is September 26th with the first debate. Tens of millions of Americans are expected to

watch it live.

I'm Katty Kay.

I've covered American presidential elections

since 2004, and I've never seen a race like this one.

Polls show it's tightening. so the three debates starting next Monday could prove

crucial in determining who will be America's next president. The question is, how do you

win a U. a US election debate?

Ladies and gentlemen, please welcome Hillary Clinton. How are you? The Republican nominee for President Donald Trump.

The debates give the American public the only chance they have to compare the

candidates side by side. The stakes are enormous. For Hillary Clinton the

pressure grew even more intense with the news that she's had pneumonia.

Even without the illness, she faces a challenge.

Just how do you debate someone like Donald Trump?

There's simply never been a candidate or a debater like him. And how will Trump

fair against Hillary Clinton's grasp of policy? He says he doesn't do traditional debate

prep with its briefings and in-depth analysis,

sweating the small detail, as Hillary puts it.

It's something she excels at, in contrast with the Donald, who favors off-the-cuff remarks, interruptions, and almost childlike

insults.

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