By Huseyin HayatseverANKARA, July 21 (Reuters) - Turkey's opposition leader, Ozgur Ozel, said he would form a new party to challenge Tayyip Erdogan, a political splintering that could boost the president's prospects of extending his 23-year rule at the next elections.

The deposed leader of Turkey's main opposition has announced plans to form a new political party to challenge President Recep Tayyip Erdogan.

By Huseyin HayatseverANKARA, July 21 (Reuters) - Turkey's opposition leader, Ozgur Ozel, said on Tuesday he will resign from the main opposition party and form a new one, amid a…