I don’t see Tiffany out there contradicting her dad’s politics. Neither do Eric, Don Jr., their wives, or Ivana or Marla. This is totally Ivanka who has brought swampthings and their mindset into the midst of those who want to drain the swamp.
Don Jr, Eric, and their wives are all CLASS ACTS and not only support our president, but more or less have the same views as he does; especially Don, who seems to really be a "chip off the old block" !
Ivanka wanted to BE THE DONALD ( ALSO TO BE A HIGH SOCIETY "BUTTERFLY" ), which sadly, broke up their once happy marriage. She's still all FOR THE DONALD and outside of doing everything, in her power, in her circle, to get him elected, has kept herself out of the picture. She's a VERY intelligent woman for doing that and understanding the BIG PICTURE.
Marla Maples has ALWAYS been just a nasty piece of work, air head, user, gold digger, publicity hound, and STUPID! She has tried TWICE ( and been stopped, LEGALLY, due to her having signed a "keep her mouth closed pledge" during their divorce ), once, quite a while ago and now, during the primary season, to grasp the spotlight and spill some beans on the president. She was one GIGANTIC, quite stupid, utter lack of good judgement mistake on Trump's part.
Ivanka has ALWAYS been her father's "pet", whom he still dotes on. She could always get away with blue murder ( blaming her brothers, especially Don, for doing something she did and he'd be the one who got punished )because of that.
Also, one really has to consider the group/s of friends she has always associated with and their views/ideas. She is an attention seeker, yearns to fit in and be lauded, so has adopted a lot of others', outside of her immediate family's ideas. And because of this bubble, she has less than NO damned idea how to behave now; vis-a-vis politically!