Most Trump fans are not fans of the current GOP outside of Trump himself. That's why his family may appeal to his base more than the more traditional GOP candidate.
Donald Trump and his children only have a future politically ( why do you think Trump is fighting so hard now, he knows four years from now is an eternity in political terms) if he stays in the daily media cycle. Remember when everyone wanted to talk about Brett Favre all the time? Non stop, nothing but Favre and he ate it all up? He loved the "Will He Retire? Let's Beg Him To Stay" routine for years. Then went on a Favre is your QB1 Savior narrative for a while. Then what happened? He retired and people stopped caring immediately.
Trump needs to stay in the daily media cycle. Two ways this happens
1) TrumpTV. But since Comcast is basically in the pocket of the Obama/Biden camp and Fox has an Obama loyalist in it's top tier power structure, the odds of this happening and getting widespread reach is slim.
https://forums.footballguys.com/forum/topic/776645-trump-2020-hq-the-great-place/?do=findComment&comment=23150971
https://forums.footballguys.com/forum/topic/776645-trump-2020-hq-the-great-place/?do=findComment&comment=23150290
2) The DOJ under Biden needs to try to put Trump in prison. The most likely paths are through campaign finance fraud via Michael Cohen and tax evasion. Putting Trump on trial puts him in the daily media cycle, and it opens up Bill Clinton and Barack Obama as clean targets for investigation. Once you make it clear Trump is free game for prison, that means the gloves are off for everyone. If the DNC pushes this and fails, then they've spring boarded Trump for 2024.
In order for Don Jr and Ivanka Trump to have a shot at POTUS, the DNC needs to push through a clean shot to prosecute Trump and that would take years. Since Kushner and Ivanka Trump turned the White House into their personal piggy bank, she has zero chance at higher office. Her ceiling is the HOR , maybe. More likely a Mayor in a mid sized place in a clear Red stronghold. Don Jr might have a chance down the road but he needs time in the HOR/Senate himself.
Trump's core base is not going to hold a grudge at the GOP for four years. When Michael Vick killed dogs, people here were talking like Vick would be hunted down and spit on forever. I said at that time, at some point, the media and public will move onto the next scandal. And they did.
The only person in the current core Trump administration with even a long shot is McEnany. She won't be blamed by many, she saw an opportunity and did the job, she's competent and fully prepared. She will appeal to the suburban women easily and much of Trump's core base will naturally gravitate to her cutback/sniper style of confrontation with the MSM.
Kayleigh McEnany has 100 times the chance of Ivanka Trump and McEnany is maybe the longest of longshots in 2024. That being said, if she actually got into a debate cycle with Biden or Harris or Newsom or AOC, she would carpet bomb them. McEnany would surgically tear anyone in front of her apart limb from limb. She's not a great public speaker and she's got a limited public skill set, but in a debate, she would bodybag anyone. She's just rare. She stays to her actual strengths and doesn't try to push harder or further than that. Her timing is impeccable. She's unflappable. She knows she's playing up to a sympathetic audience on TV instead of the rabid people in front of her. Her cut downs are violent, quick and overwhelming. She understands how to set up the person in front of her. Her questions frame her next attack and often the people in front of her are lulled into her trap. She was clearly prepared for the reality of life when white women typically hit the wall at the age of 30. In 12 years, she could be a contender. If Trump had weaponized her this entire time, this election might have ended differently. If you wan to give Trump credit for anything, it's McEnany, he found the one person who would drag him down in a street fight and then had the good sense to give her a job first.