The war of words between Rep. Alexandria Ocasio-Cortez (D-N.Y.) and White House counselor Kellyanne Conway heated up on Tuesday as each slammed the other on Twitter over the conditions at border detention centers.

Ocasio-Cortez visited what she called “concentration camps” this week and emerged with harrowing reports of migrant women living in overcrowded conditions and being told to drink toilet water.

Conway fired back on Twitter, slamming the freshman lawmaker for voting against a border aid bill last month: