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Washington Correspondent 鈥� The Denver Post

Mark K. Matthews

Mark K. Matthews is a former Washington correspondent for The Denver Post.

U.S. Sen. Mark Udall, who lost his re-election bid to Cory Gardner last week, says that during his last seven weeks in office, he plans to keep all options on the table to publicize a secret report about the harsh interrogation techniques used by CIA agents in the aftermath of the 9/11 terrorist attacks. (Doug Pensinger, Getty Images)

Udall plays key role in release of congressional CIA torture report

April 26, 2016 at 3:41 a.m.

Udall plays key role in release of congressional CIA torture report

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Senate unveils CIA ‘torture’ report; Udall calls release a ‘victory’

December 9, 2014 at 2:31 a.m.

Senate unveils CIA 'torture' report; Udall calls release a 'victory'

NEXTera Energy wind farm has 250 wind turbines that dot the landscape north of Limon, Colorado.

House approves tax credit for wind energy but trouble is ahead

June 2, 2016 at 4:27 p.m.

House approves tax credit for wind energy but trouble is ahead

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Democrats want amnesty for man seeking sanctuary in church

December 1, 2014 at 7:35 a.m.

Democrats want amnesty for man seeking sanctuary in church

Wilderness photography is among the many uses of the landscape included in the Hermosa Creek Watershed Protection Act.

A bill to protect Hermosa Creek has only weeks left to pass Congress

April 26, 2016 at 3:13 p.m.

A bill to protect Hermosa Creek has only weeks left to pass Congress

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Bennet and Udall urge Obama to protect Browns Canyon

April 26, 2016 at 2:51 p.m.

Bennet and Udall urge Obama to protect Browns Canyon

DENVER, COLORADO - NOVEMBER 4: U.S. Senator-elect Cory Gardner (R-CO) speaks with friends and family behind him after being declared the winner in the race at the Colorado Republican party's election night event at the Denver Tech Center Hyatt on November 4, 2014. Gardner defeated incumbent U.S. Sen. Mark Udall (D-CO).

Michael Bennet and Cory Gardner look ahead for Colorado, their careers

April 26, 2016 at 3:39 p.m.

Michael Bennet and Cory Gardner look ahead for Colorado, their careers

President Barack Obama speaks during a nationally televised address from the White House in Washington, Thursday, Nov. 20, 2014.

Colorado Republicans split over response to new immigration policy

April 26, 2016 at 10:55 a.m.

Colorado Republicans split over response to new immigration policy

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Keystone vote fails in Senate; Colorado vote split

November 18, 2014 at 10:14 a.m.

Keystone vote fails in Senate; Colorado vote split

Rep. Ben Ray Lujan, D-N.M., center, thanks House Minority Leader Nancy Pelosi, D-Calif., right, after she announced he will take over as head of the Democratic Congressional Campaign Committee from Rep. Steve Israel, D-N.Y., left, during a news conference at the Capitol in Washington, Monday, Nov. 17, 2014.

Congressman Jared Polis falls short in bid for DCCC chair

April 26, 2016 at 3:55 p.m.

Congressman Jared Polis falls short in bid for DCCC chair