The Department of Homeland Security has requested an extra $2 billion to meet its needs by the end of September

Immigration and Customs Enforcement could run out of money as soon as next month amid the Trump administration’s ramped-up efforts to deport unauthorized immigrants.

While there are more than three months left in the fiscal year, one estimate has found that the agency is already $1 billion over budget, according to Axios. Legislators in both parties have raised concerns about the speed at which the agency is spending its funds, which may prompt Donald Trump to seek additional funds from other agencies to support his deportation efforts.

Lawmakers have stated that the department responsible for ICE, the Department of Homeland Security, overseen by Secretary Kristi Noem, could violate the law if it continues to spend at current levels.