The House will not transmit the articles of impeachment against President Donald Trump to the Senate until senators determine a process for a trial, Speaker Nancy Pelosi said Wednesday night just after the House voted to impeach the president.

The California Democrat said she cannot name impeachment managers to present the House case to the Senate until she knows what that process will look like. The impeachment managers, once named, are the ones who will transmit the articles to the Senate.

“It’s difficult to determine who the managers will be until we see the arena in which they’ll be participating,” she said.

Pelosi seemed to leave open the possibility the House may never send the articles to the Senate if the two parties there don’t agree to a fair process for a trial. But she pushed back on reporters’ suggesting she raised the notion of an indefinite hold.