On the eve of his Senate confirmation hearing Wednesday, Solicitor General-nominee Noel Francisco is the focus of a lawsuit seeking information about his participation in the legal battle over President Donald Trump's travel ban.

American Oversight, a transparency advocacy group, filed suit in U.S. District Court in Washington, D.C., Tuesday demanding documents that could shed light on Francisco's recusal, followed by his “unrecusal,” in the case.

“Given the Trump administration's lax approach to ethics, it is critical to establish whether his nominee to be the government's top litigator has been following the rules,” Austin Evers, executive director of American Oversight, said in a statement. “There's no such thing as 'half recused.'”