Clarence Thomas, United States v. Comstock, 560 U.S. 126 … (2010 | noyear)
“ Chief Justice Marshall famously summarized Congress' authority under the Necessary and Proper Clause in McCulloch, which has stood for nearly 200 years as this Court's definitive interpretation of that text: "Let the end be legitimate, let it be within the scope of the constitution, and all means which are appropriate, which are plainly adapted to that end, which are not prohibited, but consist with the letter and spirit of the constitution, are constitutional." ”
