 long before his meltdown in last week's debate, with the senior team's management of the president growing more strictly controlled as his term has gone on. During meetings with aides who are putting together formal briefings they'll deliver to Biden, some senior officials have at times gone to great lengths to curate information being presented in an effort to avoid provoking a negative reaction. It's like, you can't include that. That will set him off. Or put that in. He likes that, said one administration official.