A Clinton presidency would be like a "very bad mayor running a very corrupt city," he said.
Andrew Card also played down the issue as "so minor."
Van Hollen worked with seven other Democrats to build the case he could defeat Steny Hoyer.
The Wall Street Journal reports staffers asserted themselves in FOIA requests.
Fifteen percent of its probes end in a stalemate.
Jonathan Easley 05/19/15 10:42 PM EDT
Matt Bevin leads James Comer by 83 votes.
Jonathan Easley 05/19/15 08:17 PM EDT
The Wisconsin governor faced charges of flip-flopping in a Fox News interview.
The Republican will instead run for re-election as Indiana's governor.
Kristina Wong 05/19/15 06:40 PM EDT
Questions about the Iraq War have tripped up several prospective 2016 candidates.
The trial could be a distraction for Chris Christie, who is weighing a White House run.