What is the fine-grained topic of the following text: President Muhammadu Buhari’s chances at the 2019 elections has suffered a huge set back as 60 youth support groups of the All Progressives Congress (APC), led by Alhaji Jibrila Gazama have dumped the party and pitched tents with Peoples Democratic Party (PDP), candidate, Alhaji Atiku Abubakar, whose ambition received a big boost on Monday. Only return the topic.
60 youth support groups of APC switching allegiance to PDP candidate Alhaji Atiku Abubakar in 2019 elections.