On April 22, 2019, President Trump issued a memorandum on “Combating High Nonimmigrant Overstay Rates.”
Some of the measures mentioned in the memo include as follows:
Visa overstay rates are “unacceptably high for nationals of certain countries.”
The Secretary of State will “engage with the governments of countries with a total overstay rate greater than 10 percent in the combined B-1 and B-2…visa category,” with a goal of identifying conditions that contribute to “those overstay rates and methods to address those conditions.”
Recommended measures to combat visa overstay include:
“Suspending or limiting entry of nationals of those countries who hold B-1 or B-2 visas;”
Imposing “targeted suspension of visa issuance for certain nationals; limits to duration of admission;” and
Enforcing “additional documentary requirements.”
Measures may be developed for imposing “admission bonds” to improve compliance with the terms/conditions of visas.
See this link for more information.