"Kumar is a good chief minister and belongs to our community. Hence, we will support him in the election," he said here. Assembly polls in Bihar kick-off next month.
The 'grand alliance' of JD(U), RJD and Congress is pitted against a coalition of BJP, LJP, RLSP and HAM in Bihar.
In the steel city to participate in 'Karma Mahotsav', Hardik also spoke about the quota agitation he is spearheading and vowed to take it to its "logical end".
Hardik, convener of the Patidar Anamat Andolan Samiti (PAAS), had announced on Friday that he would launch a "lollipop movement" to register displeasure over the package.
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He, meanwhile, also advocated a review of reservation in the last six decades.
"Review of reservation should be done on development front and not for its abrogation... We should review it for seeing how to develop the communities," he said.
Asked about the development of Gujarat under the chief ministership of Narendra Modi, he said that the rich had become richer and the poor poorer in the last one-and-a-half decades in the state.
Talking about his visit to the steel city, the PAAS convener said he had come to know that the problems of Kurmis were similar to that of his Patel community. Hardik said he supported the Kurmis' demand for inclusion in the ST category instead of the present OBC.