Democratic candidates face a chaotic campaign ahead of early state primary and caucuses, thanks to Nancy Pelosi’s decision to hold up impeachment.

Although the House voted to impeach President Trump on Dec. 18, the House speaker has yet to deliver the articles of impeachment to the Senate. That means four Democratic presidential candidates, Sens. Bernie Sanders of Vermont, Elizabeth Warren of Massachusetts, Amy Klobuchar of Minnesota, and Cory Booker of New Jersey, won’t be able to make any concrete travel plans in Iowa before the state’s caucuses on Feb. 3.