Details on the absences from the BDN: article

"Also on blast from Jackson were four of the five Republicans who were “excused” from Wednesday night’s vote. Only Sen. Bradlee Farrin, R-Norridgewock, had sought the “necessary permission” for that excused absence, along with Democratic Sen. Ben Chipman, D-Portland, Jackson spokesperson Christine Kirby said.

Republican Sens. Stacey Guerin of Glenburn, Peter Lyford of Eddington, Matthew Pouliot of Augusta and Jeff Timberlake of Turner had not, Kirby said.

Guerin said she had to leave the Senate early Wednesday to attend a funeral"