Former Catalan First Minister Artur Mas has announced his resignation as the chairman of the Catalan separatist party PDeCat.

"My decision is to resign as chairman of the PDeCat", he said during a press conference, adding that his "presence limits the expansion of Junts Per Catalunya" and that the number of legal cases against him "leaves me little room for manoeuvre".

PDeCat—the Catalan Democratic Party—was formerly CiU, and then in 2017 morphed into Junts Per Catalunya ("Together For Catalonia"), the electoral platform headed by Carles Puigdemont from Brussels.

Mr. Mas hand picke...