Politicians responded to the news Monday night that a grand jury had decided not to indict Ferguson police officer Darren Wilson in the shooting death of Michael Brown by urging protestors to voice their concerns peacefully and avoid violence.

Home state Sen. Roy Blunt (R-Mo.) responded shortly after the decision was announced. "We must balance the rights of Americans to exercise their free speech alongside the rights of people to live peacefully and safely in their communities," he said in a statement. "I join Michael Brown’s family in urging protestors to do so peacefully."

Missouri's other senator, Democrat Claire McCaskill, issued a statement saying, "There will be many people who are disappointed in today’s decision, even though it is a result of a deliberate legal process that’s being independently checked by Attorney General Eric Holder and the U.S. Justice Department. While we await the conclusion of that independent investigation—and continue working together for solutions to systemic issues highlighted by this tragedy -- I’m praying that the good people of St. Louis and local law enforcement will remain peaceful and respectful of one another."

Rep. John Lewis (D-Ga.), a civil rights icon, urged protestors to resist any desire to lash out violently.

Rep. Emanuel Cleaver (D-Mo.) took to Twitter to encourage followers to make their voices heard in the electoral process:

Sen. Tim Kaine (D-Va.) released a statement saying, “In light of the grand jury decision not to prosecute officer Darren Wilson for the shooting of Michael Brown, I ask authorities to respect the right of all people to express themselves during this understandably emotional time, as well as urge the people of Ferguson and the nation to respond peacefully and constructively. Going forward, it’s critically important that we do more as a nation to address the tense relationship between law enforcement and local communities that was prevalent well before this tragedy, particularly in communities of color."

Rep. Jan Schakowsky (D-Ill.) was among the politicians who quickly voiced their disappointment with the grand jury's decision.

"An indictment in this case would have prompted a trial in which all aspects of Michael Brown’s death would be carefully weighed and considered, and justice could have been served," she said in a statement.

Rep. Keith Ellison (D-Minn.) concurred:

Rep. Elijah Cummings (D-Md.) said in a statement that he was "disappointed" in the grand jury's decision not to indict Wilson. But he added, "We must respect that decision. The Department of Justice will continue its review of this incident and the entire Ferguson Police Department, and I am confident that investigation will bring us closer to the justice that Brown’s family and the entire Ferguson community deserve."

The liberal group Democracy For America called on the Obama administration to pursue federal charges against Wilson.

"If St. Louis County won't hold Police Officer Darren Wilson accountable for killing Michael Brown, it's time for President Barack Obama and Attorney General Eric Holder to ensure justice is done by issuing federal charges against Officer Wilson," Democracy For America spokesman Neil Sroka said in a statement.

Others later chimed in with calls for peace: