"Franken has been invisible, not just nationally, but in Minnesota. Cong. Paulsen or Kline would make this a competitive race in a moment," he tweeted. "I'm confident a strong candidate will emerge against Al."
The former senator has stayed involved in national politics, running the center-right super PAC American Action Network and helping with the Hispanic Leadership Network, a group looking to help expand Hispanics' presence in the GOP.
Those close to Coleman told The Hill in November that he was unlikely to run against Franken but might make a bid for Minnesota governor — and his next tweet hinted that might be a possibility.
"My hope is 2 be spending more time focused on Minnesota, not as much on Washington," he wrote.