The loss of Jhakhand assembly can not be said to be the start of end of Modi's era. Voters always vote differently in Lok Sabha election and State assembly election considering different factors.
“We cannot solve the poverty problem but we can definitely make the middle-class poorer,” seems to be the Congress motto this time. Enough to scare the middle-class.
Though it did not matter in 2014, Tamil Nadu would turn out to be a crucial state for BJP to make up for potential losses in UP due to a the unholy alliance between the SP and BSP.