The tax plan has been marketed by President Trump and Republican leaders as a straightforward if enormous rebate for the masses, a $1.5 trillion package of cuts to spur hiring and economic growth. But as the bill has been rushed through Congress with scant debate, its far broader ramifications have come into focus, revealing a catchall legislative creation that could reshape major areas of American life, from education to health care.

Some of this re-engineering is straight out of the traditional Republican playbook. Corporate taxes, along with those on wealthy Americans, would be slashed on the presumption that when people in penthouses get relief, the benefits flow down to basement tenements.

Some measures are barely connected to the realm of taxation, such as the lifting of a 1954 ban on political activism by churches and the conferring of a new legal right for fetuses in the House bill — both on the wish list of the evangelical right.

With a potentially far-reaching dimension, elements in both the House and Senate bills could constrain the ability of states and local governments to levy their own taxes, pressuring them to limit spending on health care, education, public transportation and social services. In their longstanding battle to shrink government, Republicans have found in the tax bill a vehicle to broaden the fight beyond Washington.