The 100-member Senate is currently divided 50-50 between Republicans and Democrats, with vice president Dick Cheney casting the tie-breaking vote. If Jeffords switches parties, the Democrats will have a 51-49 majority; if Jeffords becomes an independent, the Democrats will have a 50-49 majority. All committee chairmanships currently held by Republicans will switch to the Democrats. This would spell real trouble for president Bush's energy policy. The worst blow would be in the Senate Energy and Natural Resources Committee, where Senator Frank Murkowski (R-Alaska), a strong supporter of expanding US energy supplies, would lose his chairman's seat to Senator Jeff Bingaman (D-New Mexico).