Froehlich says he's leaving the G-O-P after serving in the minority party for five years "with no prospects of that changing." He says he thinks he can more effectively represent his district by being in the majority.
Froehlich added that the Republican Party has developed a reputation for being unfriendly toward minorities, particularly on national security and immigration issues.
But House Republican Leader Tom Cross categorized the move as being "more for personal political gain than any belief on issues."
A spokesman says Democratic House Speaker Michael Madigan believes Froehlich will be "a very good member of the Democratic caucus."