Congressional Republicans delivered on their first major legislative accomplishment of the Trump era on Wednesday, when the House voted 224-201 to pass a $1.5 trillion tax package. The bill cuts individual rates for eight years and slashes the top corporate tax rate to 21 percent permanently.

Senate Republicans ran into a speed bump Thursday evening in their quest to pass a tax overhaul by the weekend, over concerns that the bill could fall far short of GOP promises of economic growth.