Question

Which senator argued that, when it came to ending slavery, there was “a higher law than the constitution”—the law of god?

Answer 1

Senator William Henry Seward of New York (who was appointed by Abraham Lincoln as a secretary of state) argued that, when it came to ending slavery, there was "a higher law than the constitution"--- the law of god? That was in 1850.
Of nineteenth century, William Henry Seward was one of the foremost Politician.