Top aides to President Donald Trump are planning additional crackdowns on immigration before the November midterms, despite a growing backlash over the administration’s move to separate migrant children from parents at the border.

Senior policy adviser Stephen Miller and a team of officials from the departments of Justice, Labor, Homeland Security and the Office of Management and Budget have been quietly meeting for months to find ways to use executive authority and under-the-radar rule changes to strengthen hard-line U.S. immigration policies, according to interviews with half a dozen current and former administration officials and Republicans close to the White House.

The goal for Miller and his team is to arm Trump with enough data and statistics by early September to show voters that he fulfilled his immigration promises — even without a border wall or any other congressional measure, said one Republican close to the White House.

Among the fresh ideas being circulated: tightening rules on student visas and exchange programs; limiting visas for temporary agricultural workers; making it harder for legal immigrants who have applied for welfare programs to obtain residency; and collecting biometric data from visitors from certain countries.

Miller, who was instrumental to Trump’s early travel ban — which, like the border separations, triggered widespread public outrage and was put into effect without sufficient logistical planning — is among those who see the border crisis as a winning campaign issue.