The 41-year-old Lok Sabha member from Tamluk sports a crew cut and a well-groomed appearance.
The DMK party has 18 members in the Lok Sabha, or the lower house of Parliament.
Leader of opposition in the Lok Sabha Sushma Swaraj thanked the Speaker and assured "smooth functioning of the house".
The weakness looks unforgivable given that Congress holds 207 of the 545 seats in the lower house, or Lok Sabha.
Whether he can muster the same crowds after the Lok Sabha vote will be an important signal of whether his popularity will endure.
The bill, which empowers an independent ombudsman to prosecute politicians and civil servants, was passed by the Lok Sabha, the lower house, in 2011.
After a two-day heated debate, MPs in the Lok Sabha (lower house) approved the plan to allow foreign investment of up to 51% in multi-brand retail.
BBC: Indian government wins controversial foreign retail vote
The decision by India's government to allow 51% foreign direct investment (FDI) was approved by the Lok Sabha (lower house) on 5 December and the Rajya Sabha (upper house) on 7 December.
The government victory in the Lok Sabha came about after MPs from the regional Bahujan Samaj Party and the Samajwadi Party walked out ahead of the vote, bringing down the majority required for them to win.
BBC: Indian government wins controversial foreign retail vote
The lower house, or Lok Sabha, was mostly empty when the vote took place, reports said, with Congress President Sonia Gandhi, her son and party Vice-President Rahul Gandhi - as well as other senior ministers - prominent among the absentees.
Tuesday's vote capped a dramatic day in which Anna Hazare, the 74-year-old public face of the popular anticorruption movement, began a hunger strike in Mumbai, drawing out thousands of supporters to push the government to strengthen the bill submitted to the lower house, known as the Lok Sabha.
Some 16, 000 candidates will contest the elections to Parliament's lower house, the Lok Sabha. (The members of the Rajya Sabha, the upper house, are indirectly elected by state assemblies or appointed by the president.) In addition, about 17, 000 candidates will simultaneously contest the elections to the six state legislatures.
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