Did federal prosecutors just breach Trump's red line?

Pay close heed to the Wall Street Journal’s reporting that Trump Organization chief financial officer, Allen Weisselberg has been given immunity in return for his testimony against President Trump’s former lawyer, Michael Cohen.

After all, President Trump has previously said that efforts by special counsel Robert Mueller to look into his personal finances would constitute a crossed “red line.” In addition, while the Cohen prosecution is being handled separately from Mueller’s investigation, Trump seems to view any investigation related to him as part of what he describes as the “witch hunt.”