House Majority Whip Steve Scalise (R-La.), two Capitol Police officers and a congressional staffer were also shot Wednesday morning while practicing for Thursday's congressional baseball game for charity.
U.S. Rep. Bruce Westerman of the state's fourth district said on Twitter: "I am ok".
Mickelson says Mika is director of government relations for Tyson's Washington, D.C., office and that he's worked for the company for more than six years.
Tyson Foods confirmed that Mika, director of government relations in the company's Washington, D.C., office, was injured and taken to a local hospital.
Three Michigan congressman, including Bishop, were all present at the baseball practice when the shooting erupted.
Attorney General Jeff Sessions to publicly answer questions on Russia probe
Comey described the Oval Office meeting, before his one-on-one with Trump, as "a scheduled counterterrorism briefing". The White House has denied any collusion with Moscow.
Matt Mika's family says the MI native is in critical condition after being shot during a baseball practice for congressional Republicans. He was taken to a local hospital and is now listed in critical condition following surgery.
Mika previously worked on Capitol Hill for two MI congressmen, former Rep. Dave Camp of Midland and Rep. Tim Walberg of Tipton. The family says "baseball is one of his great passions".
Walberg noted that Mika was a "wonderful asset" to the GOP baseball team, waking up early in the morning to help out "when he didn't have to".
"We appreciate the outpouring of support for Matt and please ask that you keep him, his family and everyone affected by this senseless act of violence in your thoughts and prayers".
The congressman said Mika's status as an "overachiever" goes back to his days playing football and baseball at Michigan's Adrian College. Mika once served on Walberg's staff. Police killed the gunman.