It seems, Karachi will still need to wait for a long time for any change. Karachi is again seeing rigged elections or no elections at all in many areas. There are reports of violence in areas like NA-255 and no elections in NA-250 and other parts of Karachi.
My experience as a voter at NA256-Meridian Grammar School polling station: Delayed start of voting. People with MQM badges openly moving in the polling station and making sure that their known voters get the chance out of turn for casting their votes while others get frustrated in heat. This will discourage new voters which are more likely to cast their vote for PTI.
Also inside polling station they are taking cards of old people and first timers to cast their votes.Those who knew what they are doing resisted but many dont even know what is happening. If this is happening in educated areas then forget about other areas.
MQM is a product of establishment and if America wants MQM so establishment (Army, rangers etc) will keep a blind on what ever MQM does.
Despite all this people should come forward and vote! Vote PTI in Karachi to show you are not sheeple.