As House Democrats barrel toward a speakership coronation, Senate Dems are getting their first contested race for leader in over 30 years.Why it matters: Democrats have spent years tearing themselves apart over the party's direction — without forcing their leaders to win a head-to-head vote.Senate Democrats will get that fight this year for the first time since Tom Daschle vs. Chris Dodd in 1994 — courtesy of Chris Van Hollen (D-Md.) challenging Chuck Schumer (D-N.Y.).