Regardless of how the 2020 election turns out, Ivanka Trump has stated that she isn't sure she will return to the White House with the standard political excuse of considering her family. (
https://www.cnbc.com/2019/12/30/ivanka-trump-may-not-return-to-the-white-house-if-trump-wins-in-2020.html)What is clear is her political ambitions remain. While Kushner has managed to move past his prior image with some genuine diplomatic successes, Ivanka remains having been pretty unimpressive in her status as Advisor to the President. Childcare and paid leave, her pet project, are nowhere to be seen. So where does she go from here?
This other article (
https://www.thecut.com/2019/08/what-will-ivanka-trump-do-after-she-leaves-the-white-house.html) says she likely won't return to New York either way and more likely she goes to Florida like her father. Mar-a-Lago is in Palm Beach County where Trump is registered as his residence. Perhaps she will reside there? Brian Mast has a district in Palm Beach but redistricting is coming up. Could Ivanka get her father to flex his political muscles and get a seat drawn for her? After all, it's not like there's any other real options for advancement if she does move to Florida.
Similarly, we also have Don Jr who is the more movement conservative political figure among the two. He loves campaigning, fell in love with Montana during 2018, and supposedly seriously considered running for Governor of New York in 2018. I think he's getting a little more politically knowledgable and figures within the GOP like him. Running for Governor of NY is madness, but running for a red state is not, especially with his name recognition. Where could he run? Montana isn't up. Is there another state that he has some relation to that he could parachute in for a run?
So yeah, this is for mindless speculation I guess but please base it on what's realistic and plausible. I don't think the Trump family is out of politics though.