Speaker struggles to muster enough Republican votes as lawmakers object to provisions and cost

• US politics – live updates

Donald Trump’s signature tax-and-spending bill is hanging in the balance as Republicans struggle to muster sufficient votes in the US House of Representatives.

House speaker Mike Johnson is determined to pass the bill as soon as possible, but has been frustrated by lawmakers who object to its provisions and overall cost. They have blocked House Republicans from approving a rule, which is necessary to begin debate on the measure and set the stage for its passage.