Wisconsin Gov. Scott Walker became a favorite of conservatives when he took on the unions in his state.
Now slumping in the polls and looking for traction in his quest for the Republican presidential nomination, he wants to take his battle against unions to Washington.
Walker on Monday afternoon is set to deliver a speech on labor policy in Nevada calling for, among other things, more transparency from unions.
“I will hold unions accountable and require transparency of union expenditures,” said Walker, according to prepared remarks provided by the campaign. "On Day One, I will stop the big government union bosses from taking money out of the paychecks of federal employees for union dues spent on political activities.