Wisconsin Gov . Scott Walker signed a bill into law on Monday , making his state the 25th to ban requiring union dues as a condition of employment . President Obama fired back , calling the wave of similar laws ' a sustained , coordinated assault on unions ' Walker has emerged as the the White House 's latest front-running in the 2016 hunt for GOP and is already using the bill-signing to raise money . Republican-dominated state legislature approved the bill in just two weeks .
Wisconsin Gov . Scott Walker signed a bill into law on Monday , making his state the 25th to ban requiring union dues as a condition of employment . President Obama fired back , calling the wave of similar laws ' a sustained , coordinated assault on unions ' Walker has emerged as the GOP 's latest front-running in the 2016 hunt for the White House and is already using the bill-signing to raise money . Republican-dominated state legislature approved the bill in just two weeks .