[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/03/16/art.bennet.0316.gi.jpg caption =" President Obama will participate in a tele-town hall hosted by Senator Michael Bennet Tuesday night."]
Washington (CNN) - With a week to go until Colorado's primary, Sen. Michael Bennet is getting a helping hand from the nation's top Democrat.
Bennett, who faces a very competitive primary challenge from former Colorado House Speaker Andrew Romanoff, teams up Tuesday night with President Barack Obama.
The president is scheduled to join a tele-town hall of Colorado residents hosted by Bennet. The White House sent out an email Tuesday afternoon adding the event to Obama's schedule. A Bennett campaign spokesman describes the tele-townhall as a political event.
Bennet remains in the nation's capital this week, as the Senate remains in session before leaving Washington for summer recess. Bennet was plucked out of political obscurity early last year when Colorado Gov. Bill Ritter named him to replace Sen. Ken Salazar, who stepped down to serve as Interior Secretary in the Obama Administration.
As the sitting senator, Bennet enjoys the backing of the national party and the White House. President Obama headlined a fundraiser for Bennet in Colorado early this year and last month he recorded a robocall and sent out an email in support of the senator.
Romanoff has his own big name endorsement. Earlier this summer former President Bill Clinton announced he was backing Romanoff, who he's known since 1992. Romanoff also supported Hillary Clinton's bid for the 2008 Democratic presidential nomination.
The winner of the Democratic primary will face off in what's expected to be a competitive general election contest against either former Republican Lt. Gov. Jane Norton or Weld County District Attorney Ken Buck. Both primaries have turned increasingly bitter over the past month.