What visa and green card processes will be affected by Trump’s executive order “Suspension of Immigration”?

Trump's tweet announcement to "suspend immigration to the United States" by executive order has visa and green card applicants in all categories concerned about what this means to them. On the night of Monday, April 20, 2020, President Trump announced his intention to "temporarily suspend immigration to the United States." The Tweet said the following: "In light of the attack by the Invisible...