Scott Walker is used to protesters by now.
They famously flooded the Wisconsin state Capitol in 2011 in a demonstration against his anti-union policies, and on the post-announcement presidential campaign trail they've even taken to interrupting his meals.
Protesters have become so associated with Walker's moves that their appearance Monday during his Iowa State Fair speech was predicted in advance, with the Milwaukee Journal Sentinel calling anti-Walker activity a "fact of life" in his presidential campaign.
So when demonstrators did, in fact, interrupt him Monday, Walker seemed to be feeding off their yelling, handily integrating their protestations into his standard stump fare. As the intermittent booing at the start of his speech gave way to outright shouting by the end, Walker had a coherent response to the protesters: I've seen this all before, and I'm not going anywhere.
"If you give me the chance, I will not be intimidated, just like I wasn't intimidated here or anywhere else," Walker said.
As Walker spoke at the Des Moines Register's Presidential Soapbox, pro-Walker crowd members dueled with anti-Walker protesters to see who could shout the loudest and whose signs could be the most prominent. (Look below to see who won on that second front.)