Democratic lawmakers from southern border states are saying President Joe Biden is failing them in addressing the migrant surge.

Both Democratic senators from Arizona have backed Republican Gov. Doug Ducey’s deployment of 500 National Guard soldiers to the U.S.-Mexico border. On Wednesday, Sen. Kyrsten Sinema said the state’s resources, which are in addition to existing federal law enforcement on the border, are not enough to handle the rising number of people illegally crossing in the Tucson and Yuma regions of the state.