For the past two months, a small group of senators from both parties has been negotiating a deal to address the crisis at our southern border. The lawmakers are united in their desire to stop unauthorized migrants from entering the United States — an ambitious objective that has eluded past administrations.

But the policies under discussion are likely to drive more unauthorized migration to the border and make President Biden’s immigration challenges even worse.

In December border officials processed some 300,000 migrants — the most recorded in a single month. Over the past decade, Republican leaders in Congress have failed to come to the table to negotiate on immigration policies that Americans support, and yet they have created the false perception that Trump-era policies can solve the border crisis. Mr. Trump’s record on immigration shows it’s just not that simple.

The negotiations demonstrate how far the immigration debate has shifted away from solutions that once defined bipartisan immigration reform efforts, like a 2013 Senate bill that would have prioritized border security and a path to legal status and eventual citizenship for the estimated 11 million to 12 million undocumented immigrants living in the United States.

In 2016, Donald Trump killed broad support in his party for this type of deal by casting immigrants as threats to our nation. As president, he restricted the number of immigrants coming to the United States, separated families, and dismantled our immigration courts, hampering the ability to process asylum seekers at the border. And yet in 2019, under his watch, there was a 90 percent increase in migrant apprehensions along the southern border compared to the year before.

Today, as the crisis is being felt not just along the border but also in cities across the nation, voters strongly disapprove of President Biden’s handling of the border. His administration has not taken meaningful action to stop Republican-controlled states from sending buses full of asylum seekers to cities with no advance notice or to step in with a federal solution. As a result, Democrats are now more open to working toward a solution that reduces unauthorized immigration.