"In our meeting today with Craigslist, we urged the site to swiftly shut down the online brothel operating from its pages," Blumenthal said in a statement. "Craigslist's measures to combat prostitution and pornography are so far inadequate, failing to curb activities that contribute to human trafficking, child exploitation and other crimes."

He also said that if Craigslist fails to take action, he will consider taking legal action against the site.

In a blog post, Tuesday's meeting "cordial and productive." He also pointed to the progress that they've been making to curb inappropriate advertising and that they continue to develop more improvements to the site.