There was a striking moment in the Senate Judiciary Committee’s debate on the Gang of Eight comprehensive immigration reform bill when Republican Jeff Sessions and Democrat Charles Schumer argued over the number of immigrants who would be allowed into the country under the new legislation.

Sessions cited reports suggesting the figure would be more than 20 million over the next decade in addition to the 11 million or so who are already in the United States illegally. Schumer took issue with that, although he wouldn’t name a figure of his own.