Problem
Read the following sentences from the text.
"This initial proposal, called the Lucretia Mott Amendment, was controversial even among the suffragists who had campaigned for the 19th Amendment. Some hoped it would find success where similar state-based efforts had failed, while others worried it would undermine labor protections for women workers, such as maximum hour limits, minimum wages, and bans on night work. (Men did not have such protections.)"
What does the word undermine most closely mean as it's used here?