WASHINGTON, April 4 -- Sen. Tom Cotton, R-Arkansas, issued the following news release: * * * Cotton, Sullivan, Colleagues to Austin: NATO is Not a Charity Senator Tom Cotton (R-Arkansas), along with Senator Dan Sullivan (R-Alaska) and 20 of their Senate Republican colleagues, today sent a letter to Secretary of Defense Lloyd Austin requesting an update on how the Department of Defense evaluates U.S. activities as they relate to North Atlantic Treaty Organization (NATO) members' defense expend  more