TMTPOST-- As global markets tumbled and trading partners threatened retaliation following President Donald Trump’s sweeping tariffs, bipartisan lawmakers pushed back Thursday with a new bill to rein in executive trade authority. Republican Sen. Chuck Grassley and Democratic Sen. Maria Cantwell introduced legislation that would require congressional approval for future tariffs, while House Democrats prepared a separate effort to force a vote repealing the current levies. The backlash on Capitol Hill largely split along party lines, though some Republicans voiced unease over the market turmoil triggered by the tariffs.