The political map of West Bengal is being redrawn in real-time as 20 Trinamool Congress (TMC) Lok Sabha MPs have declared they are merging with the obscure Nationalist Citizens Party of India (NCPI) to avoid the anti-defection law's penalties, while extending support to the ruling NDA.

• What's proposed: A constitutional workaround allowing MPs to defect without disqualification by merging with a technically separate party.
• How it affects you: This move...