The Congress party has raised concerns after its national president Mallikarjun Kharge and Leader of Opposition (LoP) in Lok Sabha Rahul Gandhi were not invited to the state banquet at Rashtrapati Bhavan honouring Russian President Vladimir Putin’s two-day visit to India, says report. In contrast, senior Congress leader Shashi Tharoor, Member of Parliament (MP) from Thiruvananthapuram, received an invitation to the event.