Rep. Greg Walden will support former Massachusetts Gov. Mitt Romney’s bid for the White House.

Romney is scheduled to announce the Oregon Republican’s endorsement during a fundraising swing through Walden’s home state today, according to a campaign source.

Walden is the latest in a growing list of Congressional Republicans who have recently announced they’re backing Romney. More than two dozen Members have declared their support for Romney, the largest total among Republicans seeking the GOP nomination in 2012.

But Walden’s endorsement is particularly notable given his ascending position in the House Republican leadership. Walden serves as deputy chairman of the National Republican Congressional Committee and chairman of the House Republican leadership.

Walden praised Romney as the “best qualified to run, win and govern effectively.”

“As the senior elected Republican in Oregon, I would not normally wade into a primary, but these are not normal times,” Walden said in a statement. “I personally know several of the other candidates and have great respect for their willingness to run and for the integrity and honesty they bring to the debate. But the country under President Obama has become more divided and the people are worse off. Governor Romney is best qualified to run, win and govern effectively.”

Walden is the fourth Member of Congress to come out in support of Romney this week, following Sen. Thad Cochran (R-Miss.), Rep. Judy Biggert (R-Ill.) and Rep. Michael Grimm (R-N.Y.). Former House Speaker Dennis Hastert (R-Ill.) also announced his support of Romney this week.

See the full list of 2012 endorsements on the Hill here.