Gov. Walker issues ice bucket challenge, Sen. Ron Johnson accepts

MILWAUKEE (AP) — Gov. Scott Walker laid down the challenge, and Sen. Ron Johnson delivered.

As part of a charity fundraiser, the Republican governor posted a video on Facebook on Thursday showing himself and his wife Tonette getting a tub of ice water dumped on them. He then challenges three fellow Republicans — Johnson, Rep. Paul Ryan and Republican National Committee Chairman Reince Priebus — to follow suit.

Johnson tweeted video of himself Friday doing just that. He's standing by a river and says he's camping in the Utah mountains. Then he fills a coffeepot with stream water and douses himself. He doesn't extend the challenge to anyone else.

Priebus tweeted to Walker, "Ok you're on pal..." but hasn't posted video of himself doing it.

A message left with a Ryan spokesman was not immediately returned.