The $1tn public works bill, which would apply to routine transportation, broadband, water systems and other projects, enjoys wide support but liberal Democrats are linking it to their more ambitious welfare and climate change bill.

That bill would raise taxes on corporations and the rich, investing the revenue in a broad array of social programmes, including early childhood education, universal preschool, government-funded two-year college education, paid family and medical leave, an expansion of government health insurance and environmental spending.