Drumcree parade fallout leads to MP quitting Northern Ireland's DUP

• MP Carla Lockhart resigns from the Democratic Unionist Party (DUP) over the Drumcree parade.
• The DUP's support for the Protestant Orange Order march through a Catholic area caused backlash.
• Lockhart had previously called for the removal of First Minister Michelle O'Neill.
• The fallout from the parade has damaged the DUP's standing in Northern Ireland.
• Lockhart's resignation highlights internal party tensions over the parade issue.