For the three biggest (and most scrutinised) public engagements on the road to the White House, the Democrat nominee mimicked both her opponent, Donald Trump, and the American flag via her outfits.

To the first presidential debate, she donned a red suit.

At the second she went with navy (with a cream trim).

And for the final engagement she wore white. The cream wool crepe curved-front jacket with horn buttons and cream wool crepe pants, completed the flag trifecta.

Trump also teamed with the theme and wore a navy suit, white shirt and red tie to two of three events.

All three of Clinton's debate ensembles were Ralph Lauren creations, an American designer she has worn regularly on the hustings.

She last wore white at the Democratic convention where she accepted the party's nomination, following in the footsteps of Geraldine Ferraro who, in 1984, accepted the nomination as the first female vice-president.

White has many historical and pop cultural references. It was the colour of choice for the first steps of the women's movement when suffragettes were encouraged to wear white to the marches of the early 1900s. It is now considered the uniform of fictional White House crisis communications expert, the no nonsense Olivia Pope - star of the TV series, Scandal.

Clinton, a self-described "pantsuit aficionado", has reportedly been advised on her campaign wardrobe by Vogue editor-in-chief, and staunch Clinton supporter, Anna Wintour.

While it has never been confirmed, this week the fashion bible broke with tradition and officially endorsed Secretary Clinton for the top job when the US head to the polls on November 8.

"Vogue has no history of political endorsements. Editors in chief have made their opinions known from time to time, but the magazine has never spoken in an election with a single voice. Given the profound stakes of this one, and the history that stands to be made, we feel that should change," the editorial read.

Team Clinton has leveraged the support of the American fashion industry during the election, with many designers, like Marc Jacobs, Diane von Furstenberg and Jason Wu, designing her official merchandise. All of which was "made in America".

This week's Broadway fundraiser, the Hillary Clinton Victory Fund - Stronger Together show, was a catwalk show of the collection as a cavalcade of celebrities, like Julia Roberts and Billy Crystal, wore the t-shirts to address the crowd.

A standout was Bill Clinton, who issued a more subtle nod to the cause by wearing a bespoke pocket square embroidered with the word "Hillary" by designer Thakoon.