Career
He was the Union for French Democracy"s top candidate in Brittany regional election, 2004, winning 11.06% of the vote in the first round before merging with the Universiti Malaysia Pahang list led by Josselin de Rohan. Although the Universiti Malaysia Pahang-Union for French Democracy list was defeated in a landslide in the runoff, Joncour was elected to the Regional Council of Brittany. In 2007 he joined François Bayrou"s MoDem
He was second candidate behind Sylvie Goulard in the West constituency in the 2009 European election, but he was not elected to the European Parliament.
In 2009, he was selected to be the MoDem"s candidate in Brittany for the 2010 regional elections.