President Trump has been a role model for America's place in the world: non-interference. Fighting revolutionary wars for others is a bad idea. It has only backfired. Pakistan, Afghanistan, and Iraq are just a few examples. Hong Kong's October 4 declaration of a provisional government is a model of what should be done to help another democratic revolution: nothing. Real democratic revolutions must happen on their own and Trump knows that. He might be the only president in our time to know that.
Even though he does not interfere as presidents before him have, the non-interference fans among Democrats continue to attack him. That, too, is backfiring.
The president has an obligation to investigate criminals. Joe Biden and his son have extremely dubious financial entanglements and possible connection to elements Robert Mueller investigated. If the Mueller investigation was so important, then President Trump ought to pursue loose ends that Mueller and Congressional Democrats didn't. When a foreign country is party to elements of such a serious investigation as Mueller's, as well as extremely dubious dealings of the Bidens, the Attorney General of the United States ought to cooperate with the government of that country through official channels.
Trump asked for just that and no more.
Trump did not ask to connect secret attorneys or organizations. He did not request back door channels. He did not ask for unofficial cooperation. And, the people he wanted to investigate were not without serious suspicions.
Had President Trump not asked Ukrainian President Zelensky for the official cooperation he did, Trump would not have been doing his job as president. As for Biden and the supposed "political campaign rivals" accusation Congressional Democrats conjured, Joe Biden should be aware that running for president doesn't allow a candidate to break the law without being investigated. Biden started his dubious dealings long before he was a presidential hopeful. If claiming "for political purposes" is granted to every candidate under investigation, Democrats could make crime vanish merely by declaring the entire population to be political candidates.