"I will not support the building of a wall that does not make us safer. The [Trump] administration itself, people within it, have already said this is not about security, this is not how we're going to make ourselves safer. The kind of wall that is proposed now is a monument to hate and division. We are a better country than that."
Source: CNN, "CNN Hosts Town Hall with Sen. Elizabeth Warren (D-MA)," transcripts.cnn.com, Mar. 18, 2019