Union minister and Congress' Katoch, who has assets worth over Rs 10 crore, is fighting to retain her Jodhpur seat.
She bagged the seat in 2009 after defeating the then BJP sitting MP Jaswant Singh Bishnoi by over 98,000 votes.
Katoch, sister of the head of erstwhile Jodhpur royal family Gaj Singh, is said to have won last time mainly because of the support from her community.