No. It most definitely will not. That's compliance to the "drug-free workplace" law, which is Federal.
Trump is absolutely going to do everything he can to force states who have legalized it, to comply with federal law.
Trump is absolutely going to do everything he can to force states who have legalized it, to comply with federal law.
On the other hand, you degrade respect for the law when so many people are against its enforcement.
Were I Trump I would propose the end of federal drug laws other than trafficking. Possession is something the states can regulate if they wish, and anyway federal possession statutes are unconstitutional. On a practical level they're grossly unfair and give state prosecutors a lot of extra power, because people can always be threatened with prosecution under federal laws, which carry much tougher sentences in most cases.
But Trump can propose anything he wants. The action has to come from Congress, ultimately.
If you don't want a job don't take the job. Otherwise you do it to the best of your ability.