The incident happened shortly after jury selection for the hush-money trial was completed
Many Indian - and some US - companies that act as subcontractors sponsoring workers on H-1B visas and deputing them once they are in the US to work elsewhere could see their business model hit.
Those offered the most wages will get priority instead of those hitting "a lucky number" in the lottery, the official said.
The official said that Trump wants the wage structure for H-1B visas to be changed from the current one set during the administration of former President Bill Clinton, and the new minimum will be the 50th percentile of the national income.
When Trump imposed a 60-day pause on permanent immigrant visas or green cards on April 22, the H-1B and other temporary work visas escaped the freeze but are now affected.
The green card restrictions, which do not apply to spouses and children of immigrants, will also now continue until the end of the year.
The White House announcement of the new freeze said that it would also encompass H-2B, H-4, L-1 and J-1 visas.
However, those in the healthcare field and those considered important for national security will be exempt and continue to receive visas, as will farmworkers and nannies.
The White House linked the freeze to the high unemployment level in the US because of the Covid-19 blow to the economy saying that the pause is to "ensure we continue putting American workers first during our ongoing coronavirus recovery."
The official said the pause would help workers already in the country get access to more than 525,000 jobs.
The Covid-19 pandemic has become a justification for Trump's longtime intent to restrict immigration, a demand of a part of his base as well as of some in the Democratic Party who have reservations about the impact of immigration on wages.
The economic disruption caused by the pandemic has led to a groundswell of opposition among Americans to immigration and foreign workers with various polls showing more than two-thirds supporting restrictions.
On the other hand, US businesses - particularly in the Silicon Valley - have opposed restrictions on the visas and asserted that they would, in fact, affect the nation's economy, where immigrants and those on work visas have disproportionately been founders of companies, besides holding up America's global leadership in technology.
The Indian government considers restrictions on H-1B an important issue and External Affairs Minister S Jaishankar said in December that he had told US officials that the visas "should not be obstructed" or "unreasonable legislative provisions should not constrain" them.
H-2B visas are for non-professional workers. An exemption is be made for agricultural labour in this category on whom the US food supply depends, the official said.
Similarly, in the J-1 category nannies or au pairs -- who are employed by the elite across the political spectrum -- are exempt, while it would apply to scholars and researchers except those in certain health or specialised fields or are professors.
The H-4 visas are for spouses of H-1B workers and the restrictions are linked.
Employees transferred by their companies to work in the US are given L-1 visas.
Under new rules announced on Monday by the immigration service, asylum applicants cannot apply for work authorisation for a year instead of the current 150 days.
Explaining the rationale for the proposed reforms to the H-1B visa system, the official said that last year there were 225,000 applicants for the 85,000 slots and the lottery determined who got them.
The applicants with the top 85,000 wage offers would get the H-1B visas in the switch to a system based on income.
Basing the visas on the highest wages offered will help determine who will contribute the most to the US economy, the official said.
The official said, "This will drive both the wage level and the skill level of the H-1B applicants up. It will eliminate competition with Americans, it will reduce American competition in these industries at the entry-level, and will do more to get the best and the brightest."
Regarding the proposal to ban outplacement, the official gave the examples of Disney or AT&T where subcontracting companies sent in workers who "end up displacing American workers."
The official said that these two companies "infamously had their American citizen employees training their H-1B replacements as their last act" before being laid off.
The incident happened shortly after jury selection for the hush-money trial was completed
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