By Nishan Khatiwada in The Kathmandu Post, April 14, 2023The writer is a reporter covering national politics for The Kathmandu Post.The Rastriya Swatantra Party (RSP) and its leaders, including its chair and parliamentarians, have been courting controversies, one after another, in under a year of the party’s formation. Most recently, the RSP expelled its lawmaker Dhaka Kumar Shrestha from the party on Wednesday over a leaked audio in which a voice, allegedly Shrestha’s, demands Rs20…