Almost 15,000 Ukrainian civilians have been killed and just over 40,000 injured since the start of the war through last December.
Denmark, Norway, Sweden, France, Germany, the United Kingdom, the Netherlands and Finland would face the tariff.
Trump's comments came hours before Vice President JD Vance was to host Danish and Greenlandic officials for talks.
President Trump did not offer any details about what the help would entail.
WASHINGTON (AP) — The U.S. has seized two sanctioned oil tankers linked to Venezuela in back-to-back actions in the North Atlantic and the Car…
Russia puts death toll from Ukrainian strike at 27 as Zelenskyy names intelligence chief to new role
Russian authorities say a Ukrainian drone strike on a café in the Kherson region has killed 27 people.
President Trump said he would consider extending U.S. security guarantees for Ukraine beyond 15 years, according to President Zelenskyy.
This past week Trump demanded that Venezuela return assets that it seized from U.S. oil companies years ago.
Israel and Hamas have agreed to a pause in their two-year war and the release of the remaining hostages in exchange for Palestinian prisoners.
It’s been two years since thousands of Hamas-led militants poured into southern Israel after a surprise barrage of rockets.