Did Joe Biden really appoint Kamala Harris as a "border czar"? Nope. Here's an AP dispatch reporting what happened:
Harris is tasked with overseeing diplomatic efforts to deal with issues spurring migration in the Northern Triangle countries of El Salvador, Guatemala and Honduras, as well as pressing them to strengthen enforcement on their own borders, administration officials said. She’s also tasked with developing and implementing a long-term strategy that gets at the root causes of migration from those countries.
At lunch today a friend urged me to revisit Biden's actual announcement. So I did. Here it is (cleaned up slightly):
I’ve asked her, the VP, today — because she’s the most qualified person to do it — to lead our efforts with Mexico and the Northern Triangle and the countries that are going to need help in stemming the migration to our southern border.
....The Vice President has agreed to lead our diplomatic effort and work with those nations to accept the returnees, and enhance migration enforcement at their borders. We’re already talking with Mexico about that; she’s already done that.
This is about as clear as it could be. Biden was reinstituting an Obama-era program that addressed the "root causes" of migration from Central America: gang violence, drug trafficking, hurricanes, floods, earthquakes, and so forth. Harris was in charge of working with key countries on this and distributing $700 million in funding. Here's how it worked out:
Illegal migration from the three countries Harris targeted declined from 50% of the total to less than 20% today. In raw numbers, migration from those countries peaked at about 100,000 shortly after Harris took over and began declining after that. Total migration today is less than 30,000 per month.
If there was ever an actual border czar, it was and is Alejandro Mayorkas, the Secretary of Homeland Security. Republicans know this very well. They even tried to impeach him for being a bad czar.