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Energy Secretary Steven Chu popped in for perhaps one of his final appearances as a member of the Obama administration. With many of President Obama’s top Cabinet officials already announcing their departures, it is widely expected that Chu is also on his way out.

When asked about his greatest accomplishment of the past four years, Chu told The Hill that it should “take the night off.”

Other Obama administration officials also made appearances, including Vice President Biden, who spoke of addressing climate change.

Obama has said climate change ranks among his top three priorities for his second term, though he has not detailed specific policy plans for tackling the issue.

Outgoing Environmental Protection Agency Administrator Lisa Jackson and departing Interior Secretary Ken Salazar also made brief speeches from the Newseum’s main stage.

Several politicos also dropped by the event.

Sen. Bernie SandersBernard (Bernie) SandersOvernight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Senate passes 0B defense bill Dems fear lasting damage from Clinton-Sanders fight MORE (I-Vt.) spent a good deal of time watching his New England Patriots fall to the Baltimore Ravens in the AFC Championship game.

Sens. Al FrankenAlan (Al) Stuart FrankenGOP eying 'blue slip' break to help Trump fill the courts Overnight Regulation: FTC launches probe into Equifax | Dems propose tougher data security rules | NYC aims to slash greenhouse gas emissions | EPA to reconsider Obama coal ash rule Overnight Cybersecurity: Kaspersky to testify before House | US sanctions Iranians over cyberattacks | Equifax reveals flaw that led to hack MORE (D-Minn.), Bob CaseyRobert (Bob) Patrick CaseySenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill GOP eying 'blue slip' break to help Trump fill the courts Dems offer alternative to Trump administration's child care proposal MORE (D-Pa.) and Mark UdallMark UdallDemocratic primary could upend bid for Colorado seat Picking 2018 candidates pits McConnell vs. GOP groups Gorsuch's critics, running out of arguments, falsely scream 'sexist' MORE (D-Colo.) and Rep. Paul Tonko (D-N.Y.) stopped by as well.

Rep. Edward MarkeyEdward (Ed) John MarkeyOvernight Regulation: FTC launches probe into Equifax | Dems propose tougher data security rules | NYC aims to slash greenhouse gas emissions | EPA to reconsider Obama coal ash rule Overnight Cybersecurity: Kaspersky to testify before House | US sanctions Iranians over cyberattacks | Equifax reveals flaw that led to hack Dems propose data security bill after Equifax hack MORE (D-Mass.), who is running in a special election to replace Sen. John KerryJohn Forbes KerryBringing the American election experience to Democratic Republic of the Congo Some Dems sizzle, others see their stock fall on road to 2020 The Hill's 12:30 Report MORE (D-Mass.), elicited stadium-style cheers when he gave a speech on the Newseum’s main stage.

Markey said he entered the race to replace Kerry — who is expected to be confirmed as Obama’s next secretary of State — because he wants to elevate climate change and clean-energy discourse in the upper chamber.

“Are we ready for another green revolution? Yes we are,” Markey said.