I can't find a chart that is literally just number/year, but the chart at the top of https://www.migrationpolicy.org/programs/data-hub/charts/imm... is about the closest I can find.

If you look at it, you'll see that, yes, a million or two million or whatever immigrants arrived during the last year biden was in office.

However, if you're not trying to use statistics to lie, what you'll also find is that millions came every year for the past fifty years, including the years trump was president.

There might be some specific "record number" but only in the sense that the total population of humans increases every year so when the same percentage does the same thing as last year, the absolute number is now larger.

And of course this all ignores the part where immigration is a huge benefit to america.

There's a number of things going on here, but the short of it is that to become the democratic nominee you need to convince a whole bunch of people, including some super delegates. Hillary Clinton did a better job of this than Bernie Sanders.

How she did it could probably be the subject of an entire book, but no one has ever come up with any particularly scandalous stories about it so far.