Washington: US President Donald Trump has extended restrictions on work visas until March 31. The result has been an extension of the implications for temporary workers going to America to work for a short time. Immigration restrictions have also been extended. This will not affect the green card applicants. The Trump administration has issued orders extending the sanctions, which expire Dec. 31, by March 31. President Trump has said these decisions are necessary to protect American workers in the wake of the economic downturn with Corona. Meanwhile, President-elect Joe Biden has criticized the decisions.