Why did RJD, Lalu Yadav banish Tej Pratap? Did he plan coup with BJP’s help before Bihar Assembly Elections?

Though the apparent reason for expelling Tej Pratap Yadav from the RJD seems to be his Facebook post declaring his relationship with a lady for 12 years, his penchant for political drama as a reason can not be ruled out. Ex-Bihar Chief Minister Lalu Yadav decided to crack the whip sensing a coup.