BTW, the little squib you've quoted isn't the entire Footnote Four.
Footnote 4 ] There may be narrower scope for operation of the presumption of constitutionality when legislation appears on its face to be within a specific prohibition of the Constitution, such as those of the first ten Amendments, which are deemed equally specific when held to be embraced within the Fourteenth. See Stromberg v. California, 283 U.S. 359, 369 , 370 S., 51 S.Ct. 532, 535, 536, 73 A.L.R. 1484; Lovell v. Griffin, 303 U.S. 444 , 58 S.Ct. 666, decided March 28, 1938.
It is unnecessary to consider now whether legislation which restricts those political processes which can ordinarily be expected to bring about repeal of undesirable legislation, is to be subjected to more exacting judicial scrutiny under the general prohibitions of the Fourteenth Amendment than are most other types of legislation. On restrictions upon the right to vote, see Nixon v. Herndon, 273 U.S. 536 , 47 S.Ct. 446; Nixon v. Condon, 286 U.S. 73 , 52 S.Ct. 484, 88 A.L. R. 458; on restraints upon the dissemination of information, see Near v. Minnesota, 283 U.S. 697 , 713-714, 718-720, 722, 51 S.Ct. 625, 630, 632, 633; Grosjean v. American Press Co., 297 U.S. 233 , 56 S.Ct. 444; Lovell v. Griffin, supra; on interferences with political organizations, see Stromberg v. California, supra, 283 U.S. 359, 369 , 51 S.Ct. 532, 535, 73 A.L.R. 1484; Fiske v. Kansas, 274 U.S. 380 , 47 S.Ct. 655;
Whitney v. California, 274 U.S. 357 , 373-378, 47 S.Ct. 641, 647, 649; Herndon v. Lowry, 301 U.S. 242 , 57 S.Ct. 732; and see Holmes, J., in Gitlow v. New York, 268 U.S. 652, 673 , 45 S.Ct. 625; as to prohibition of peaceable assembly, see De Jonge v. Oregon, 299 U.S. 353, 365 , 57 S.Ct. 255, 260.
Nor need we enquire whether similar considerations enter into the review of statutes directed at particular religious, Pierce v. Society of Sisters, 268 U.S. 510 , 45 S.Ct. 571, 39 A.L.R. 468, or national, Meyer v. Nebraska, 262 U.S. 390 , 43 S.Ct. 625, 29 A.L.R. 1446; Bartels v. Iowa, 262 U.S. 404 , 43 S.Ct. 628; Farrington v. Tokushige, 273 U.S. 284 , 47 S.Ct. 406, or racial minorities. Nixon v. Herndon, supra; Nixon v. Condon, supra; whether prejudice against discrete and insular minorities may be a special condition, which tends seriously to curtail the operation of those political processes ordinarily to be relied upon to protect minorities, and which may call for a correspondingly more searching judicial inquiry. Compare McCulloch v. Maryland, 4 Wheat. 316, 428; South Carolina State Highway Department v. Barnwell Bros., 303 U.S. 177 , 58 S.Ct. 510, decided February 14, 1938, note 2, and cases cited.
http://caselaw.lp.findlaw.com/scripts/getcase.pl?navby=search&court=US&case=/us/304/144.html
Yep, that makes it clear as mud.
The way law is written makes it an ass.