Some conservative members of Donald Trump's "Make America Great Again" movement have reacted angrily to the president's plans to sell weapons to Nato, arguing it is a betrayal of his promise to end US involvement in foreign wars.

On Monday, Trump said that Russia's failure to reach a negotiated settlement with Ukraine within 50 days would lead to his administration imposing a 100% tariff rate on Russian imports as well as what he called "secondary tariffs" on countries that have continued to do business with Moscow.

Donald Trump is growing impatient with Russian President Vladimir Putin, publicly lamenting earlier this week the fact that Russia hasn't agreed to a peace deal with Ukraine.Trump also promised new tariffs if a peace deal doesn't come in 50 days.

After years pressing to end U.S. aid to Ukraine, many Republicans have abandoned that position now that President Trump is supporting the country against Russian aggression.

Trump's moves underline his growing disenchantment with Russian President Vladimir Putin over the lack of progress in U.S.-led efforts to secure a ceasefire.

President Trump announces arrangement where NATO pays for US weapons sent to Ukraine, as Russian strikes intensify across Ukraine, including an attack on a maternity hospital.

U.S. military and NATO officials are discussing a possible plan that could be unveiled in the coming days to provide Ukraine with much-needed aerial defense weapons.

President Trump is weighing new funding for Ukraine for the first time since taking office in January, diplomatic sources told CBS News.