Conventional wisdom holds that party polarization leads to legislative gridlock, which in turn disables congressional oversight of agencies and thus erodes their constitutional legitimacy and democratic accountability. At the root of this argument is an empirical claim that higher levels of polarization materially reduce legislative productivity as measured by the number of laws passed or the number of issues on the legislative agenda addressed by those laws, both of which are negatively associated with party polarization. By focusing on the content of statutes passed rather than their number, this essay shows that in the era of party polarization and divided government, Congress has actually 1) enacted an ever growing volume of significant regulatory policy (packaged into fewer laws); 2) increasingly employed implementation designs intended to limit bureaucratic and presidential power; and 3) legislated regulatory policy substance in greater detail (reducing bureaucratic discretion) when relying on litigation and courts as a supplement or alternative to bureaucracy. This essay thereby complicates, both empirically and normatively, the relationship between Congress and administrative power in the era of party polarization and divided government.