[img_assist|nid=909|title=San Francisco Mayor Gavin Newsom|desc=Getty Images Photo|link=none|align=none|width=420|height=279]San Francisco Mayor Gavin Newsom, who was in Washington, D.C., today to testify before Congress on green building standards, is on a plane home this evening in anticipation of the California Supreme Court’s Thursday morning decision on the legality of same-sex marriage, a mayoral spokesman tells PolitickerCA.com.

The court’s decision, which comes four years after Newsom allowed 4,000 couples to wed in City Hall, is almost certain to dominate California political headlines tomorrow.

Stay tuned to PolitickerCA.com for more on the story.