Here are the top quotes from Team Tharoor's letter:
The facts are damning and the election process in Uttar Pradesh is devoid of credibility and integrity.
What we have witnessed in Uttar Pradesh is at a completely different level and it is an open challenge to the authority of your office as well as contempt for the orders of the Hon'ble Congress President and the Congress Working Committee to hold free and fair elections.
We would like to underline that we have no evidence that Mallikarjun Kharge ji was aware of how his supporters were engaging in electoral malpractice in Uttar Pradesh. He would not allow the tainting of an election that is so important for the Indian National Congress.
We did not contest this election to accept business as usual. We are ready to fight for the integrity of this election.
We suspect voter fraud in this election. We do not see how this election can be deemed free and fair if the tainted process of Uttar Pradesh is allowed to stand.
"Frontal Attack On Constitution": Congress Chief Slams Poll Rules Tweak Trinamool Congress Leader Abul Nasar Found Dead At Hotel In West Bengal US Congress Passes Bill To Avert Government Shutdown Is Safe Car Enough? Volvo Crash That Killed CEO, Family Sparks Big Question Snack Food Epigamia Founder Rohan Mirchandani Dies Of Cardiac Arrest At 41 "Nothing Short Of Nightmare": Woman Misses Life Event, Slams Air India In PM's Kuwait Visit, Top Honour, Bilateral Meet, Delegation-Level Talks Putin Meets Slovak Prime Minister at Kremlin: Russian Television Germany To Probe Possible Security Lapses Before Christmas Market Attack Track Latest News Live on NDTV.com and get news updates from India and around the world.