I am obviously missing something here. Maybe I should ask what specifically about Mrs trump reminded you of Jackie. The color, style of coat and hair were extremely different.
And, for what is worth, my initial comment was a reply to a poster who said the blue color was reminiscent of the color Jackie wore. That could not be farther from the truth.
The color (Jackie Kennedy wore pastels & wore more monochromatic colors than she did prints) & the style (the 3-quarter sleeves, the gloves, the matching pumps, the cut of the suit) were reminiscent of Jackie Kennedy.
Melanie's Inaugural Day "look" was an updated, modern take on a vintage style & made some people think of Jackie O. It was the "styling" more than an actual copy.
No, the color did not match what Jackie wore on JFK's Inaugural Day. But, while the coats (& dresses) were a different color, both coats came up around the neck - even though Jackie's coat was black around the neck while the rest of the coat was tan. Both coats were 3-quarter sleeves, & they both wore similarly styled gloves.
Yesterday, my FB feed was filled w/ "Ooh, she looks like Jackie O!" comments, & there are tons of different articles from all kinds of different sources comparing the two. Last night, I don't think a reporter could talk about the blue Ralph Lauren suit w/o saying something about Jackie Kennedy.
It's okay if you weren't reminded of Jackie, but lots of other people were.
EDITED TO ADD - Of course, her hair wasn't going to look exactly like Jackie's hair. Melanie has long hair, while Jackie wore her hair in a shorter style. But, yesterday, for the Inaugural Day ceremonies, Melania wore her in an upswept bun which also was a nod back to a classic hairstyle.