From TPM:

Sen. Chuck Grassley (R-IA) dug in against a public option today, telling MSNBC this morning that “the government is a predator.”
“When you have the government running something, the government is not a fair competitor,” he said. “The government is a predator, not a competitor.”
Grassley, ranking member of the Senate Finance Committee and key Republican negotiator on the health care reform bill, said he wouldn’t vote for a plan without widespread Republican support.