First of all, the existing laws are actually stronger than the pathetic bill that was put forth, which would essentially normalize the situation at the border by allowing over 5,000 people in per day. For example, here’s what ANY president who doesn’t believe in open borders can do:
This is from the National Review link Once migrants were released into the country, they were unlikely ever to be deported, so the administration sought, as much as possible, to detain people until they were removed, which meant changing practices that, as it turned out, were largely discretionary. Soon after Trump took office, in early 2017, the number of migrants dropped precipitously thanks to the so-called Trump effect, the belief south of the border that Trump would enforce the law so z…
The answer to your second question is one, don’t elect a Democrat as president if you don’t want an open border. Otherwise, put together a real bill on border security like HR2.