Shiromani Akali Dal (SAD) chief Sukhbir Singh Badal said the Centre is trying to intimidate farmers through NIA after farmers' leader Baldev Singh Sirsa and Punjabi actor Deep Sidhu were summoned among 40 others. "Strongly condemn Centre's attempt...They aren't anti-nationals. And after failure of talks...it's absolutely clear that GOI is only trying to tire out farmers," Badal tweeted.