After resigning from Congress, former MP from UP's Unnao Annu Tandon joined Samajwadi Party (SP). SP chief Akhilesh Yadav tweeted, "Hearty greetings and welcome to...Annu Tandon on joining the Samajwadi Party!" "For several months there was a misalignment between the state leadership and me, which made it difficult to work," Annu wrote in her resignation letter to Sonia Gandhi.