Gurudas Kamat on Tuesday ignored Congress party's warning that he may lose his ministerial post if he did not take the oath as Minister of State with independent charge.
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Kamat, who is MoS in the Ministries of Home and Communication and IT, was made Minister of State with Independent Charge and given a new portfolio of Drinking Water and Sanitation.
Kamat, who is reportedly sulking over not being made a Cabinet minister in the reshuffle, did not attend the swearing-in ceremony at the Rashtrapati Bhavan.
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"He won't be a minister if he does not not take the oath (for elevation)," highly-placed party sources said reacting to Kamat's sulk.
A fifth-term MP, Kamat, (57), was elected from Mumbai North West constituency in the 2009 elections.