Currently there is no "Republican party" just Trump loyalists. In 2030 the party might still be called the same but I doubt it will have moved far from the principles of today.
The Republican party looks about the same as it has my whole adult life -- the leader is a lot louder and the racism is less hidden, that's about it.
I don’t know how old you are but the GOP has 180’d on trade, international relations, unions, Social Security, and Medicare among many other issues over the past 30 years.