KOLKATA: West Bengal chief minister Mamata Banerjee on Thursday wrote a five-page letter to governor Jagdeep Dhankhar , protesting against the “direct attacks” he had been making on “an elected CM” and her council of ministers despite being a “nominated” functionary.The public letter opened a new chapter in the Trinamool government’s testy relationship with the governor, who Mamata accused of “transgressing the constitutional dharma” and “ignoring” the state government’s advice when it was busy fighting the Covid-19 pandemic.The governor, who has been tweeting regularly about the state government’s handling of the situation, responded — again on Twitter — and called the letter “outrageously (and) factually wrong and constitutionally infirm”. He will give an elaborate response on Friday, he added, raising the possibility of yet another full-scale confrontation between the state government and the governor.Mamata’s letter on Thursday took exception to the language and tenor of the governor’s “direct attacks” on her and her cabinet colleagues and called them an “unspeakable and unconstitutional sin”. She also charged Dhankhar with “holding press meets against the state he heads” and quoted Babasaheb Ambedkar , who held that the powers of the governor were “limited, nominal and ornamental”.Dhankhar has, over the last few days, questioned the Trinamool government on the “low” number if Covid tests and flagged issues like the “PDS scam”. He has also alleged that the state government is being run “in a whimsical manner” and advised it to ensure free movement for the teams sent by the Union government to Bengal. He has also alleged that he was denied a Covid update since April 8 when state chief secretary Rajiva Sinha met him last.