China Calls For Release of Arrested Huawei CFO Detained In Canada (nbcnews.com)
China is demanding the release of a senior executive at Huawei after she was detained in Canada on extradition charges to the U.S. Wanzhou Meng, who is also the deputy chair of Huawei's board and the daughter of company founder Ren Zhengfei, is suspected of violating U.S. trade sanctions against Iran. NBC News reports: The arrest of Meng Wanzhou, chief financial officer and daughter of the company's founder Ren Zhengfei, spooked investors with U.S. stocks tumbling on fears of a flare-up in Chinese-U.S. tensions. She was arrested in Vancouver, British Columbia, on Dec. 1. China's Ministry of Foreign Affairs said officials have been contacted both in the U.S. and Canada to demand Meng's release. Geng Shuang, a spokesman for the ministry, said her detention needed to be explained, and both countries had to "effectively protect the legitimate rights and interests of the person concerned." A spokesperson for Huawei said in a statement that it "complies with all applicable laws and regulations where it operates, including applicable export control and sanction laws and regulations."
China arrests Americans all the time for much dumber reasons. Turnabout is fair play.
“Common sense is not so common.” — Voltaire
That is a pretty dumb comment, even for you. They are shipping US origin products to Iran. There is a US sanction against Iran. Hope you understand, but I doubt you will.
It's not quite so open and shut. The President inarguably has the power to pardon. However, the President is arguably limited in his power to actually intervene in the investigation and prosecution of a crime. He is, after all, sworn to "“faithfully” execute the laws of the United States" (or, as it says in Article II, Section 3, "take care that the Laws be faithfully executed."). If and when someone is found guilty of a crime, then the power of the Presidential pardon can come into effect. But the Constitutional basis for stopping an investigation prior to a guilty verdict is on shaky ground.
That said, many Presidents have wielded that power and stopped their attorney generals - members of the executive branch - from pursuing certain investigations or dropping lawsuits, nominally under the guise of setting priorities. This power is usually left unchallenged unless it is done for overtly political reasons. But a strong judicial challenge could be made that this would exceed the power invested in the President by the Constitution. So far, fortunately, there has never been an instance when the President has been so challenged.
In this particular case, when an actual arrest has been made, it becomes increasingly difficult for a President to intervene as the case now falls far more under the Judicial branch's purview than the Executive's.
So yes, the parent post was not as wrong as you imply; it would be improper and quite possibly illegal for Trump to intervene, at least at this point. After the case runs through the courts, then the President could use his power of pardon but acting before would likely create a Constitutional crisis of some sort.