It could have aggravated the situation further as the court has already said that it might examine the letter to ensure if it was written properly.
What the government should do is to just write the letter and if president does enjoy international immunity, than Switzerland will anyway not initiate any proceedings against him until he remains president. That’s what the PPP wants and that’s what Aitzaz Ahsan has also been saying all along.
Lastly, don’t we know what Zardari wants to reap from the field of this case? PPP badly needs something for electioneering and a sacrificed PM will provided the required fodder for the next elections.