Trump warned on Wednesday that he might cut financial aid to countries who voted in favor of the resolution.
Trump said Mexico is doing a "great job" and its actions have had "a very big impact" on migration.
Trump said, "China is very serious, and we are very serious," adding that the tariffs announced "will continue unless we make a trade deal".
Trump had given mixed signals on how hard he would push for billion in border wall funds. But he dug in Thursday, telling House Republican leaders he wouldn't sign the Senate bill that didn't have the money.
Trial stoppages are not uncommon in phase III trials for vaccines. The trials for AZD-1222 by AstraZeneca Plc and Oxford University were temporarily paused in September and then restarted, also after reports of adverse effects.
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Trump posted the message hours after he greeted at the Joint Base Andrews outside Washington the three US citizens who were released by the DPRK.
Trump was scheduled to leave the ROK for his home country later in the day.
Trump made the remarks when asked by a World War II veteran at the Oval Office in the White House.
Tu Youyou, China's only Nobel laureate in medicine, was on the team. Tu won the Nobel Prize in 2015 for her discovery of artemisinin, an antimalarial treatment derived from sweet wormwood, a TCM herb.