What he did is the very reason why the Framers wrote the impeachment clause to start with! If this is not worthy of impeachment, nothing is, according to the opinion of 500 constitutional scholars. The Framers provided the impeachment device precisely to avoid foreign influence in the US government (together with the emoluments clause). Trump clearly tried to enlist a foreign head of state to help him with a domestic election. There is little that is more in tune with the spirit of the impeachment device than this.
By the way, if the Dems chose to investigate him for violations of the emoluments clause, they'd have ample opportunity to find very damaging stuff. Like I said elsewhere, I wouldn't hold him accountable for the simple fact that foreign dignitaries stay in his Trump properties (hotels, resorts) although yes, several memos and opinions by the DoJ and think tanks establish that this is a violation of the emoluments clause. I'd say to this, don't sweat the small stuff. But I'd love to see an investigation on the Chinese-Indonesian deal. Remember when the Department of Commerce imposed sanctions on a tech Chinese company whose cell phones were deemed by the FBI as containing espionage devices, and the State Department issued a directive that no American officials should carry those phones, and the company suffered consequences? Well, Trump has always spoken against the Chinese in these matters... but then, he spoke in private with the Chinese president, and suddenly changed his mind, and directed the Department of Commerce to lift all sanctions against the company, atypically saying that he thought that holding the sanctions would damage employment creation in China. Since when is Trump worried about creating jobs in China??? What a lame excuse!! So, I was puzzled about it, thinking, what the hell is Trump thinking and doing? Surprise surprise, seven days later the Chinese government announces a 500 million investment in an Indonesian touristic conglomerate project that will include.... drum roll... a Trump resort!
Now, if what Trump did was to change the US policy towards a foreign entity, as a quid-pro-quo to obtain to his corporation's Indonesian project a fat financing deal, that's the utmost violation of the Emoluments Clause, and an impeachable offense.
Did it happen as a cause and effect, as a quid-pro-quo? I don't know, but it's precisely why I think it should be investigated. The coincidence, and Trump's lame excuses to favor the Chinese company, are too close to ignore. Maybe it's all innocent, maybe the Chinese would invest in this business anyway, but it is worth investigating.
Unfortunately, instead of looking at all the corrupt dealings this guy is surrounded with, the Dems acted too fast and only voted on two articles of impeachment. They should have continued to investigate, and should have followed the money.