A caravan the Trump administration discussed at length before the US midterms recently reached a port of entry, and was attacked with tear gas. After this proved controversial, there was much discussion of prior use of pepper spray (and, depending on the source, tear gas) in the Obama era, even at the same port of entry. Some sources claim at least one gas type has been used less frequently since Trump took power (which raises the question of what happened with the other gas).
Is there any important difference between the two eras' policies? For example:
- Is one gas more harmful, and if so is it now used more or less willingly?
- Have there been changes in the frequency of such attacks, the standards determining when they are used, or the targets chosen for them?
As a side question, did such practices begin with Obama, or an earlier President?