Total US incarceration (prisons and jails) peaked in 2008. Total correctional population peaked in 2007. See table below. If all prisoners are counted (including juvenile, territorial, ICE, Indian country, and military), then in 2008 the USA had around 24.7% (2,424,279) of the world's 9.8 million prisoners.
Prisoners in 2008. (NCJ 228417). December 2009 report from the U.S. Bureau of Justice Statistics (BJS). By William J. Sabol, Ph.D. and Heather C. West, Ph.D., BJS Statisticians. Matthew Cooper, BJS Intern. See Table 9 from page 8 of the PDF. Table note says: "Total includes all inmates held in state or federal public prison facilities, local jails, U.S. territories, military facilities, U.S. Immigration and Customs Enforcement (ICE) owned and contracted facilities, jails in Indian country, and juvenile facilities." Total on table is 2,424,279 for 2008.
Republicans think they can spend an infinite amount of money (many trillions of dollars) on health-insurance-company-based healthcare, and have an infinite number of babies, to feed their appetite for endless ground wars, and for more inmates for more prisons for more drug war.