Thaddeus McCotter is a name. His mother was Joan McCotter, a former city clerk. Without the name recognition that Tad got from his mother, it is unlikely that he would ever have been elected.
Thaddeus McCotter is an enabler. He votes with President Bush 92% of the time.
Thaddeus McCotter is a fringe conservative in moderate's clothing. Though he paints himself as a man with the center on his mind, he was rated 0% by NARAL, 100% by the Christian Coalition, and 0% by the ARA, a group opposed to the privatization of social security.
Thaddeus McCotter is a rubber stamp.
Here is a campaign ad from 2006: