Trump's big reaction to US Supreme Court ruling on his sweeping tariffs: 'Have backup plan'

Key Highlights

• Supreme Court ruled 6-3 that Trump's tariffs were illegal.
• Tariffs were part of Trump's 'Liberation Day' agenda and targeted multiple countries.
• The court found that Congress, not the president, has the authority to impose tariffs.
• Trump claimed the tariffs were crucial for the US economy and federal revenue.
• The ruling represents a significant check on Trump's use of executive authority.