Donald Trump has won the New Hampshire primary. It's the first major win for Trump, whose vitriolic and bombastic campaign has dominated news coverage of the GOP presidential primary.

But years before he became the epicenter of Republican campaign politics, Trump was using Fox News to pave the way for his eventual presidential run. And since then, Fox has become Trump's de facto communications shop, defending his campaign's missteps and giving him tens of millions of dollars in free airtime:

Voiceover by Carlos Maza.