He was unsuccessful in his attempt at a comeback in the 2006 federal election in the riding of Dartmouth—Cole Harbour losing to incumbent Michael Savage by just over 4,000 votes.
[10] It was during his time as MP that the Liberal Government announced the shutdown of the coal mines run by the Cape Breton Development Corporation.
Mancini and other political leaders fought for increased pension packages for the workers and an economic diversification fund.
When Robert Chisholm resigned as leader of the Nova Scotia NDP in 1999, Mancini was seen as a possible front runner for the post but declined to run.
[11] He is married to Marian Mancini, who was elected to the Nova Scotia House of Assembly on July 14, 2015.