Some advocates of school vouchers have been pushing it as a means to enable funds to go to parochial schools without violating the Establishment Clause of the US Constitution. They have been doing this while cutting funding for public schools.
Jonathan Turley says that the state of Tennessee is having second thoughts about its voucher program because of the possibility of some of that money going to fund Muslim schools. As a result, in an unexpected ironic twist to to prevent that possibility, the Republicans in the state legislature are threatening to kill a measure to expand the voucher program.
Secularists have been pointing out for a long time that efforts by Christians to break down the wall of separation between church and state would, apart from violating the constitution, have as one consequence that the government would end up having to deal will all manner of religious beliefs seeking such funding. But of course they did not listen.