<prompt> Translate the following text to EnglishLSC inatangaza katika muhtasari wake, na waliojibu hawawezi kukataa, kwamba chini ya masharti haya LSC haiwezi kuendeleza changamoto au ulinzi wa sheria ya marekebisho ya ustawi iliyopo, Maelezo mafupi kwa Mwombaji katika No.  <response>: The LSC declares in its brief, and respondents do not deny, that under these provisions the LSC can sponsor neither challenges to nor defenses of existing welfare reform law, Brief for Petitioner in No. 