I just got word that two prominent Edwards supporters are joining the Barack Obama camp on the Iron Range. Minnesota House Majority Leader Rep. Tony Sertich (DFL-Chisholm) and U.S. Rep. Jim Oberstar (also DFL-Chisholm) will endorse Obama today. Who else is on board? I only know of Rep. Tom Anzelc (DFL-Balsam) who endorsed Obama last week. Others may follow. A lot of this is happening quickly as caucuses approach in just four days.