New Hawaii senator pledges to tackle climate change

Schatz is expected to be sworn in Thursday afternoon. He will serve until 2014, and plans to run for the special election to fill the remaining two years of Inouye’s term. Schatz also said he would run for a full term in 2016.

Schatz will serve with incoming Sen. Rep. Mazie HironoMazie HironoDems up pressure on Wells Fargo executives Overnight Finance: Lawmakers float criminal charges for Wells Fargo chief | Scrutiny on Trump's Cuba dealings | Ryan warns of recession if no tax reform Anti-trade senators say chamber would be crazy to pass TPP MORE (D-Hawaii), who is replacing retiring Sen. Daniel Akaka (D-Hawaii).

Hirono and Schatz likely will both champion climate change.

Hirono was named to the Senate Committee on Energy and Natural Resources earlier this month, and touted clean energy on the campaign trail. Green groups have praised Hirono’s positions on energy and climate change.

While Hirono and Schatz might be more in the traditional environmental mold, the group of Democratic senators who are more centrist on energy issues also is growing.

Sens.-elect Heidi HeitkampHeidi HeitkampMoney for nothing: Rethinking CO2 Liberal groups urge Schumer to reject Bayh for Banking gavel Court ruling could be game changer for Dems in Nevada MORE (D-N.D.) and Joe DonnellyJoe DonnellyGreat Lakes senators seek boost for maritime system Liberal groups urge Schumer to reject Bayh for Banking gavel A dozen senators call for crackdown on Chinese steel MORE (D-Ind.) will likely orbit Sens. Joe ManchinJoe ManchinTrump questions hound endangered Republican Dems to McConnell: Pass 'clean' extension of Iran sanctions Convicted ex-coal boss says he’s a ‘political prisoner’ MORE (D-W.Va.), Mary LandrieuMary LandrieuTrump’s implosion could cost GOP in Louisiana Senate race Louisiana needs Caroline Fayard as its new senator La. Senate contender books seven-figure ad buy MORE (D-La.) and Mark BegichMark BegichTrump campaign left out of Alaska voter guide Ryan's victory trumps justice reform opponents There is great responsibility being in the minority MORE (D-Alaska) on energy issues.

Heitkamp will come to the Senate with North Dakota’s recent oil-and-gas boom in mind, likely aligning with oil-patch senators Begich and Landrieu on a host of issues. And the more conservative Donnelly might agree with Manchin’s hands-off approach to regulating greenhouse gas emissions.