![US President Joe Biden stands amid children cheering with US, Polish and Ukrainian flags after he delivered a speech in front the Royal Warsaw Castle Gardens in Warsaw, Poland on February 21, 2023.](https://imagenes.elpais.com/resizer/v2/VUGGHOBSUOCY4KT6QMCOL6C2DU.jpg?auth=0b535617c455983c534c6cdfc2cde92300599865bae25e101b287409dabb9d83&width=414&height=311&smart=true)
Ukraine aid faces a stress test as some GOP 2024 presidential candidates balk at continued support
There long has been an isolationist strain in the United States, particularly in the Republican Party, but rarely has it been shared by so many candidates for president