Biden has two choices to stop illegal immigration under his presidency.
Re-implement Trump's executive orders (that he canceled immediately after taking office). Those measures are proven. They actually stop illegal immigration and will solve our problem without having to rely on congress to pass new laws.
Tell congress he will support HR2 policy and rally the country around a bipartisan change in our laws so something gets passed.
We are at a point where Biden must LEAD on this issue. Blaming republicans doesn't solve the problem, and actually makes it worse because they will now dig their heels in even more for being attacked on a problem they did not create.