Vice President Mike Pence travels to the southern border Friday, on the heels of House Democrats holding a hearing on dangerous conditions at overcrowded migrant detention centers.

Pence tweeted Monday that he is going to McAllen, Texas, home to one of the federal detention centers contributing to what federal investigators have called a "ticking time bomb."

An inspector general's report released last week described the conditions at the detention facilities in the Rio Grande Valley. Border Patrol managers told investigators men had clogged toilets with Mylar blankets or socks to get out of cells during maintenance.