(Bloomberg) -- The US economy is set for an unexpected fiscal boost if lawmakers back a potential deal for $70 billion worth of tax breaks for businesses and families.Most Read from BloombergApple to Shutter 121-Person San Diego AI Team in ReorganizationBiden Says US Doesn’t Support Taiwan Independence After VoteTaiwan Elects US-Friendly President, Defying China WarningsBill Ackman Is Bringing Activist Playbook to America’s Culture WarsCongressional negotiators are locked in talks over renewing