Former Homeland Security Secretary Jeh Johnson said the situation at the U.S.-Mexico border is "a crisis by any measure," as the number of apprehensions are beyond what he witnessed while serving in the Obama administration.

"4,000 arrests in a day, 100,000 in a month -- that's the population of the city of Albany, New York, that suddenly shows up on our southern border in one month -- is a crisis," Johnson said.

He said it's a humanitarian crisis for the migrants who traveled to the border seeking amnesty, it's a crisis for Border Patrol and immigration officials are who being overwhelmed, and it's a crisis for border towns that must absorb the influx of migrants.

Johnson called for Democrats and Republicans to work together in a bipartisan manner to address the problem at its source, which he said would require a "long-term investment" in addressing the poverty and violence in Central American nations.

He revealed that when his Department of Homeland Security faced a smaller immigration crisis in 2014, they did three things to get the numbers down: put out messaging to discourage migrants from making the dangerous journey, got the Mexican government to help on their southern border with Central America, and expanded their detention capability, specifically for families.

"I know what 1,000 a day looks like. I saw it myself at Border Patrol holding stations. I cannot begin to imagine what 4,000 a day looks like. It must overwhelm the system," Johnson said. "I think we have to get away from Democrat vs. Republican and 'crisis' vs. 'no crisis.' This is a crisis by any measure.”

Watch more from Johnson above, including his thoughts on the arrest of WikiLeaks founder Julian Assange.

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