The INFIGHTING is the biggest enemy of Congress in state elections 

INC has lost over half a dozen elections in last 5 years due to the same. 

Haryana : Infighting ⚡
Chattisgarh : Infighting ⚡
Uttarakhand : Infighting ⚡
Rajasthan : Infighting ⚡
Punjab : Infighting ⚡

And then you can compare results of these states with Karnataka and Telangana where no leader gave statements against own party men. 

@RahulGandhi needs to address this big time ahead of Kerala and Assam election.