Here are a few items you could check out about this matter:
Here is an item from ConstitutionCenter.org giving the history of how the clause has been complied with over the years
WaPo legal opinion/analysis item from Volokh Conspiracy legal affairs blog
WaPo item from their news section giving a rundown of the lawsuit that has been filed
Am not a Constitutional scholar nor do I play one in the movies but my gut reaction is that the lawsuit will probably fail for the reasons mentioned in some of the above articles:
Standing issues - the plaintiff has to be harmed in some way to have standing for a lawsuit.
Non-applicability - routine business activity may not be covered under the clause.
Ultimately, the goal for Trump critics is to use the clause as a way to initiate impeachment and/or force a resignation. However, impeachment is not lightly undertaken. In the history of the US, only two Presidents (Andrew Johnson and Bill…