"Both McCain and Brownback said they had received numerous briefings on the situation in Iraq before they cast their votes in 2002."
In 2002 that average security report that goes thru the
United States Senate Select Committee on Intelligence was like 234 pages. After the vetting process by this committee the entire transcript of questions and answers would be added. so you be lucky if a single report was less than 300-400 pages. Staff briefings is the way these politicians get their info. Ask slick willy how many reports he read thru completely when he as president.
however considering you keep ignoring the actual report so you can claim that the president lied about WMD even though the authors when questioned by senator Orin Hatch iraq did have Biological weapons during the relevant time frame, i guess we can't expect any more.