Stabenow has wasted no time in preparing for a potential face-off with Kid Rock. “This afternoon, Kid Rock tweeted out that he was going to have a big announcement and hinted that he was going to challenge me for the U.S. Senate,” a fundraising email from Stabenow’s campaign read. "We don’t know if this is real or just a publicity stunt, but after Donald Trump's surprising win last year, we need to act fast.”