The Congress said Kamal Nath's resignation has been accepted by Sonia Gandhi.
Senior Congress leader Kamal Nath, who was occupying two party posts, has been relieved of one under the party's "One man one post" rule. He has now stepped down from the post of the leader of the Legislature Party in Madhya Pradesh -- meaning he will no longer be the Leader of the Opposition -- and will continue as the state Congress chief.
In a letter today, the Congress said his resignation from the post has been accepted by party chief Sonia Gandhi.
The letter from senior leader KC Venugopal also said Dr Govind Singh has now been appointed to the post of the Legislature Party leader.
The new CLP leader, Dr Govind Singh, is a seven-time time sitting MLA from Lahar seat of Bhind district, which is part of Jyotiraditya Scindia's home turf, the Gwalior-Chambal region. Mr Singh is seen as close confidant of former Chief Minister Digvijaya Singh.
"I have been raising people's issues in the Assembly in the past and will continue to do so in future also as CLP leader," Mr Singh said.
"He (Kamal Nath) hasn't resigned, but has shared his responsibilities with me. I'll work as his associate and question the BJP government over public issues," he added.
The BJP, though, appeared delighted. State BJP media convenor Lokendra Parashar tweeted, "Nath wings have been clipped and Govind Singh's appointment as CLP leader means return of Digvijaya Singh's era in MP Congress. May be Nath will quit as state Congress chief tomorrow, handing over the post to tribal strongman Umang Singhar."
State BJP secretary Rajneesh Agrawal questioned a Kshatriya politician's appointment as the CLP leader. "This development has exposed once again that while the Congress does politics in the name of SC, ST and OBC, it doesn't trust them while making appointment to major posts," his post read.
Mr Nath, the former Chief Minister of Madhya Pradesh, has been heading the Congress state unit even after the party's victory in the 2018 assembly elections.
It fuelled the party's rift with Jyotiraditya Scindia, who after the election victory had aspired to the top post but later modified it to the post of the state party chief.
But with the party deciding to back Mr Nath in the party post as well, Mr Scindia joined the BJP with 22 loyalist MLAs, bringing down the government of Mr Nath.
After the BJP came to power in the state, Mr Nath became the Leader of the Opposition in the state assembly.