Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Washington (CNN) President Donald Trump signed off on press secretary Sean Spicer's decision to check aides' cell phones to make certain they weren't communicating with reporters by text message or through encrypted apps, multiple sources confirmed to CNN on Monday. The decision sent a signal across the administration that Trump is furious at leaks from inside the White House. The sources also said the President gave his blessing before Spicer blocked reporters from the briefing last Friday. When reached by CNN, Spicer denied that Trump was involved in either decision. "(Trump) did not sign off or even know what I did. That is not accurate," he said, later adding, "I don't believe he even knew there was a gaggle and in no way was it discussed with him or any other staffer."Spicer recently did a check of White House staffers' phonesSpicer denies that Trump signed off 
 Question:One person close to the situation described _ as the "enforcer."

Sean Spicer