Because she wore a white outfit to the SOTU?

Via The Independent:

Melania Trump has caused a stir at her husband’s first State of the Union address without saying a word.

Ms Trump showed up to the event – separately from her husband, as some pointed out – in a striking all-white pantsuit by Christian Dior. She coupled it with a white silk Dolce & Gabbana blouse and Christian Louboutin pumps.

Commentators quickly recognised the colour as an interesting choice: It was the same colour Democratic women wore to Mr Trump’s first address to Congress last year, as a display of resistance against his administration.

“Melania Trump in that white pantsuit looks a little Resistance curious…” a Twitter user going by the name “Caroline O” commented.