How do you solve a problem like the US southern border? If that question makes you hum a certain Sound of Music song, just know that it's more pleasant than whatever has been floating through the minds of the hundreds of members of the US Congress. Because if there was ever a week of dysfunction on Capitol Hill, this was it. Congress failed to advance, or even entertain, a bipartisan US border deal, which also included much-needed funding to Ukraine. Why? Because of a man who is not even in government now, but very well might be back again soon: Former President Donald Trump. To unpack why the border crisis is getting worse instead of better, Ian Bremmer speaks with lawmakers on opposing sides of the aisle in Capitol Hill.