He started political career from Haryana Vikas Party in the year 1991 when he contested the erstwhile Kailana seat in Sonipat unsuccessfully.
In the 2005 Haryana assembly election he contested from the Delhi bordering Rai constituency and won with a good margin.
But in the 2009 elections Hooda preferred another Brahmin Kuldeep Sharma over RC Kaushik and the ticket was denied to him.
But his stars changed as he was the 1st to grasp the Modi wave in the year 2013 among all other congress leaders like Rao Inderjeet, Ch Birender, Kuldeep Bishnoi and joined the BJP.
2019 election was a battlefield but Kaushik has always played safe and defeated Bhupendra Singh Hooda by a huge margin of 174000 votes.