The generous assignment of motivation is realpolitik anti-Russia + China stuff.

Less generous but probably true as at least part of the motivation, there’s the usual factor of US companies wanting to “invest” in a foreign country to extract natural resources.

One may guess at other, more-personal motivations for parties involved.

It, transparently, has dick-all to do with drugs.

[edit] ok technically the drug connection is the admin continuing to use that as an obviously-bullshit excuse to use powers they couldn’t ordinarily, and daring the courts to do anything about it. Same as justifying using emergency tariff powers against Canada over fentanyl. They’re counting on the courts to abdicate their power and responsibility to call bullshit on the admin’s lies when it comes to application of existing laws.