Maryland Gov. Martin O'Malley (D). (AP Photo/Patrick Semansky)

“These Republican obstructionists wouldn’t pass gas if they thought it might help our president heal our economy,” O’Malley said during a colorful address to a convention of New Hampshire Democrats.

O’Malley, chairman of the Democratic Governors Association, was booked as the “special guest” at the event in Manchester. In his speech, he also took aim at Mitt Romney, the presumptive GOP presidential nominee, and made a plea to the party faithful to ensure the election of another Democratic governor this year in the Granite State.

O’Malley, in his remarks, accused Romney of “having contorted himself into a pretzel to appease his party’s radical right.”

At Bain Capital, O’Malley said, Romney’s mission was “to return profits as quickly as possible to a very narrow few rather than to create long-term jobs for the many.”

O’Malley, who is widely believed to harbor ambitions beyond Maryland, also criticized Romney's tenure as Massachusetts governor, arguing that Romney’s record on job creation during his tenure compares dismally to that of President Obama.

Under Obama, O’Malley said: “Job creation is up. Unemployment is down. And while we still have a lot more work to do, because of President Obama’s leadership General Motors is alive and hiring and Osama bin Laden is not!”

O’Malley’s most pointed comment Saturday was aimed at Congress.

“Could our nation’s jobs recovery be happening faster?” O’Malley asked. “Sure it could. but that would require compromise, practicality, and a focus on the common good — three concepts which the newly radicalized tea party Republican Congress is now totally incapable of grasping.”

Turning his attention to Republicans at the state level, O’Malley said many no longer have “a vision loyal to the hope of a better life for all of America’s children.”

“It is the vision of an America that can no longer afford to grow its middle class or send its children to college or to the doctor,” O’Malley said. “An America where jobs and opportunities are shrinking. An America where women’s rights, workers’ rights, even voting rights are all being rolled back.”

Democrats, by contrast, are willing to make “modern investments” in education, infrastructure and other priorities, O’Malley suggested.

His appearance in New Hampshire was part of a four-state swing for O’Malley that also included stops in Wisconsin and Massachusetts and another in Maine on Saturday night where he is scheduled to address the Democratic Party there.