Senate Republicans approved a measure Wednesday that would fine any senator who is absent without leave for two or more session days, according to The Street.
The resolution also requires the absent senators to pay for any costs incurred while trying to force them to return.
The New York Post reports Republican lawmakers already stopped direct deposits on the Dems' paychecks and denied their staffs access to copy machines.
The fines are the latest in a series of attempts to reach 14 Democrats who fled Wisconsin for Illinois nearly two weeks ago to block a budget vote that would drastically reduce union bargaining rights.
Associated Press Wires contributed to this report