[8] In 2014, the Supreme Court of the United States upheld the ruling that President Barack Obama's 2012 recess appointments exceeded his authority and were thus invalid.

[12]  In its first report, the project engaged over 70 activists, union leaders, workers, labor law professors, and others in politics and academia to generate ideas and craft a comprehensive policy agenda.

[13] In its second report, the project focused on ways to adapt labor and employment laws in response to workplace challenges stemming from the COVID-19 pandemic.

[15][16] Writing for The Guardian, American labor journalist Steven Greenhouse argued that Clean Slate's proposals offer “the most effective strategy to combat America’s economic inequality and corporations’ sway over the economy and politics.”[17] Following the 2020 United States presidential election, Block served as a senior advisor on the Biden-Harris presidential transition team through January 2021 and was cited as a potential United States Secretary of Labor for the Biden administration.

Block co-edited Inequality and the Labor Market: The Case for More Competition with economist and Treasury Department counselor Benjamin H. Harris in April 2021.

On March 15, 2022, Harvard Law School announced that Block would return to the university as a professor of practice and executive director of the Labor and Worklife Program.

[25] Block is a supporter of legalizing sectoral bargaining,[26] ending at-will employment, works councils in all workplaces, and members-only unions.