Wisconsin Gov. Scott Walker upped the ante in his state's tense union standoff on Friday night, issuing layoff warning notices to 13 unions. The notices "may be able to be rescinded," Walker said, if the state's Senate Democrats, who fled Wisconsin in protest, return. Meanwhile, a Democratic Assembly member was tackled by Capitol police Thursday night when he tried to enter the building, which had been closed to the public after weeks of protests. The Assembly member, Nick Milroy, called the situation at the Capitol an “armed-palace environment,” and said the guard knocked him to the ground before he was able to produce his identification card. Police closed the building Thursday night after a judge banned protesters from staying past business hours.