Kamala Harris has made her first trip as vice-president to the nation’s southern border as the White House grapples with political pressure over a growing migrant crisis.
In El Paso, Texas, Ms Harris called for an end to “finger-pointing”. She also criticised ex-President Donald Trump.
One of her fellow Democrats said this administration’s handling of the border situation made the party look “weak”.
A record level of undocumented migrants have arrived at the border this year.
The numbers of asylum seekers and economic migrants fleeing poverty, corruption and gang violence in Latin America are only expected to grow during the summer months. This year US border agents have also separately apprehended two Yemeni men who were on a terror watchlist.