This plaid look is one of many Escada ensembles we have seen the Vice President-elect wearing.Embed from Getty Images
Below you see the Glen Plaid Blazer and Skirt. (Still looking for a product photo showing the trousers!) The Vice President-elect has worn the ensemble for several years. The jacket and skirt are a blend of wool/viscose/silk/cotton/elastane, featuring a plaid pattern in grey and white with red accents.
Here you can just see the skirt in a photo of Ms. Harris at St. Joseph AME Church in Durham, North Carolina.
The blazer is a one-button style with notch lapels, flap pockets, and a bustle-style fabric insert on the back. Below, another image of Ms. Harris at that church service in August 2019.
The skirt and trousers both have a bias-set waistband with a diagonal fabric insert in bright red, as seen below. Instead of buttons at the cuffs, the jacket uses zippers (below right).
Another view of Ms. Harris in the ensemble.Embed from Getty Images