Congress President Rahul Gandhi today approved the name of Raghu Sharma, a former MLA from Rajasthan, as the party's candidate for the Ajmer Lok Sabha by-election. AICC General Secretary Janardan Dwivedi informed that Vivek Dhakar will be the party's candidate for the by-poll to the Mandalgarh Assembly seat in the state.<br/>'<br/>Besides, a by-election will be held in the Alwar Parliamentary seat on January 29. The Congress has already nominated Karan Singh Yadav, a former MP, as its candidate for it.