if I may comment, did she light candles when she got to the WH before the parade? (Then was the zman). And looks to me the pass to ride a car was used home from the parade, to/from the ball, Shabbos morning to church and maybe more. I do have to say, she only posted on Social media pictures from the ball only on Motzai Shabbos, so maybe....
IIRC Joe Lieberman walked as VP Candidate while USSS drove alongside