Following the election defeat and subsequent resignation of Musa as prime minister and PUP leader on 30 March 2008, the party held a 2008 People's United Party (Belize) leadership election and convention to select its new leader. The party held it's nomination day on 21 February 2008 and the actual day for it's leadership election and convention on 30 March 2008. Fonseca along with second deputy leader of the PUP, Johnny Briceño stood as candidates for the party leadership at the convention, Fonseca was nominated by the United Woman's Group and several other constituency committees including Cayo West, Cayo North, Cayo South, Pickstock, Dangriga, Stann Creek West, Toledo East and Toledo West. Fonseca was thought to be the candidate preferred by the party establishment. He had the endorsements of former Prime minister, Said Musa and George Cadle Price. Fonseca also had the support of First Deputy Leader, Juan Vildo Marin and former Tourism minister, Godfrey Smith as well as from Secretary General, Henry Usher and Communication Director, Yasser Musa. Fonseca's campaigned for Leadership of the party has, to say the least, taken a life of its own. On 31 March 2008, results were announced and Fonseca was defeated by Briceño receiving 310 votes against 330 for Briceño. In Briceño acceptance speech after getting the results, Briceño acknowledged Fonseca and said “To Francis my brother, my friend, my college I offer my thanks for being a worthy opponent and a true and honourable man”. Following the resignation of Briceño as PUP leader on 7 October 2011, another 2011 People's United Party leadership election and convention was called. The party held it's nominations on 9 October 2011 and this time, both Fonseca and Albert Area Representative, Mark Espat submitted their nominations and ultimately stood as candidates for the party's leadership. However, this time the game was different. Fonseca campaigned well and sighted insecurity in the PUP that he will address if elected leader. After results were announced on 2 November 2011, it was made clear that Fonseca had emerged victorious over Espat. After he got into the leadership realms, Fonseca focused on delivering his promise and preparing the PUP for the 2012 general election. During the 2012 election campaign, he supported on further oil exploration and pledged a moratorium over continued exploration.