President Donald Trump’s planned 250-foot-tall triumphal arch could win approval as soon as Thursday, after he bulldozed a mountain of opposition to secure a final review by a federal commission. Approval would clear the way for construction to begin immediately, though a federal judge could still block the project, as some on Capitol Hill hope.

Washington, D.C., media reported that the Trump-allied National Capital Planning Commission began reviewing plans for the arch on Thursday afternoon, just two days after Republicans lost control of the Senate and the House of Representatives in seismic midterm elections. The commission is expected to approve the plans following lengthy public testimony. Meanwhile, the project’s opponents have called on the federal courts to halt it before construction can begin.