[1] Champion won the seat of Wakefield at the 2007 election, defeating incumbent Liberal Party of Australia member David Fawcett with a 56.6 percent two-party vote.

The South Australian federal redistribution in 2011 had the greatest impact on Wakefield where the Labor margin declined by 1.5 points.

Champion increased his margin at the 2016 election with a 61 percent two-party vote, again making Wakefield a safe Labor seat on paper.

[6] In 2020, Champion was rumoured to be considering a switch to state parliament, initially through the electoral district of Light in the South Australian House of Assembly, following the release of draft new boundaries that would have left the seat vacant.

[7] That plan was thwarted by the final report of the Electoral Districts Boundaries Commission, however Champion was again the topic of speculation in January 2021, this time for the safe seat of Taylor.

[11] Champion is married to Fiona Webber, a former ABC journalist and Chief of Staff to a Federal Labor Minister.