But Ethan Leib & I note the Constitution's presidential duty of faithful execution, which empowers Congress to guard against presidential bad faith.
nytimes.com/2019/10/08/opi…
The history shows this phrase signaled duties of care, loyalty, good faith, as well as deference to the legislature - similar to fudiciary duties.
harvardlawreview.org/2019/06/faithf…
papers.ssrn.com/sol3/papers.cf…