Bob Day

In the eight years he has been a member of Family First, Senator Bob Day has been the party's largest -- and often only -- significant donor. His name has appeared next to hundreds of thousands of dollars worth of donations and other payments, totally eclipsing all other donors, and given a run for his money only by the Australian Electoral Commission.

Day yesterday announced he would resign from politics after his building company went into liquidation. Day told media on Monday that he would stand down from the Senate to devote himself to sorting out the mess, including by selling off his own family home.