528
Opinion of the Court
removal proceedings. Such detention necessarily serves the purpose of preventing deportable criminal aliens from fleeing prior to or during their removal proceedings, thus increasing the chance that, if ordered removed, the aliens will be successfully removed. Respondent disagrees, arguing that there is no evidence that mandatory detention is necessary because the Government has never shown that individualized bond hearings would be ineffective. See Brief for Respondent 14. But as discussed above, see supra, at 519-520, in adopting § 1226(c), Congress had before it evidence suggesting that permitting discretionary release of aliens pending their removal hearings would lead to large numbers of deportable criminal aliens skipping their hearings and remaining at large in the United States unlawfully.
Respondent argues that these statistics are irrelevant and do not demonstrate that individualized bond hearings "are ineffective or burdensome." Brief for Respondent 33-40. It is of course true that when Congress enacted § 1226, individualized bail determinations had not been tested under optimal conditions, or tested in all their possible permutations. But when the Government deals with deportable aliens, the Due Process Clause does not require it to employ the least burdensome means to accomplish its goal. The evidence Congress had before it certainly supports the approach it selected even if other, hypothetical studies might have suggested different courses of action. Cf., e. g., Los Angeles v. Alameda Books, Inc., 535 U. S. 425, 436-437 (2002); Flores, supra, at 315 ("It may well be that other policies would be even better, but 'we are [not] a legislature charged with formulating public policy' " (quoting Schall v. Martin, 467 U. S. 253, 281 (1984))).
Zadvydas is materially different from the present case in a second respect as well. While the period of detention at issue in Zadvydas was "indefinite" and "potentially permanent," 533 U. S., at 690-691, the detention here is of a much shorter duration.
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