In a tele-townhall last night with party insiders and key supporters, a source tells Colorado Peak Politics that U.S. Senator Mark Udall claims Republicans have a “5-6 point advantage” in the 2014 elections.

While Udall was using that figure to scare up donations from supportive Democrats on the call, our source on the call thought it was an interesting admission.

Someone should ask Udall’s Colorado counterpart, Senator Michael Bennet, if he agrees with that assessment, as Bennet is running the Democratic Senatorial Campaign Committee.

Midterms election turnout tends to favor Republicans more than Presidential years, and with Obama in his second term, Democrats are destined to be facing stiff headwinds. Historically, the President’s party loses seats during second term Congressional elections.

Republicans need to pick up 6 Senate seats to take the majority.

As a longtime DC politician — Udall has been there since he won his House seat in 1998 — the stink of the DC swamps is all over Udall. That has to be a cause for concern no matter who his opponent ends up being.

Currently, Republican State Senators Owen Hill and Randy Baumgardner have announced challenges to Udall. State Representative Amy Stephens and Weld County District Attorney Ken Buck are also rumored to be looking at the race.