Lawsuit could undercut 2012 amnesty, end ongoing legal battles over Trump phaseoutTexas and a half-dozen other states filed a lawsuit Tuesday challenging the legality of the Obama-era DACA deportation amnesty, opening up a new legal front in the increasingly messy battle over illegal immigration. The lawsuit, filed in federal court in southern Texas, asks judges to rule against the 2012 program that’s granted tentative legal status to more than 800,000 illegal immigrant “Dreamers.”