One thing Trump could do that others wouldn't is to quit ties with NATO. As he alreasy haa threaten to do so. This could lead to full blown war with Europe and Russia that would spread like a wild fire towards ww3. I am not even kidding, i know people like to use ww3 as a cliche scare tactic, but this war would in a whole different scale, like something we haven't ever seen before.
I am not sure if his voters care as lot's of them wouldn't understand that it would very much affect them.
However i can't see this affecting betting ratios.
I don't think that Trump supports the dissolution of NATO. What he wants is more contribution from the EU nations. US spends close to $600 billion every year on defense purposes, while the military budget of nations such as Germany and England remains as a small percentage if their national GDP. Trump wants the EU nations to contribute in terms of funds, equipment and manpower. And I don't think that there is anything wrong in what he says. Why should the US subsidize the national defense of EU nations? Doesn't make any sense.
Donald Trump is a person who chooses to be very capitalist, and every capitalist likes to be in control and leave power to those who are convenient for themselves, at the political level we know very well that it is convenient for those who leave everything in the hands of NATO's power belongs to the USA, because it is convenient for them to have allies and that gives that nation much more power, on the other hand, it is convenient for Russia to leave everything behind because a grand coalition would put them in trouble, then it would The only thing I see here is that Trump comes in to advocate for Russia, but I don't know if this would bring more economic problems, Europe and the USA would recover, but countries that are selling oil, it would be quite a strong thing, the market would be eliminated.
if trump wants to win the next elections he needs to change his stance on many issues, for example in relation to the ukraine war, he needs to take a strong position favorable to ukraine, but from what i see he is more on the russian side, and that will do though he is not well regarded by the international community and many people, including Americans, he must also abandon his radical ideas about immigrants, if he doesn't change on certain points, he will not win these elections, some Democrat will win again. It's true that in Trump's times you didn't see much of the US getting involved in wars beyond which they were already involved and even with Biden the US is not directly sending soldiers to Ukraine they only support military equipment, if it were 10 years with former presidents would already be seeing OTAN getting directly involved in this conflict