Ron DeSantis does not consider Ukraine's future to be important to the United States.
The Florida governor is believed to be preparing for a run at the White House in 2024 and suggested that he would scale back US support for Ukraine if he became president.
DeSantis says that becoming "further entangled in" the Ukraine war is not in the nation's interest and questioned Joe Biden's "blank cheque" commitment to Kyiv.
In response to a question sent by Fox News presenter Tucker Carlson to leading Republican politicians, DeSantis said: "While the US has many vital national interests - securing our borders, addressing the crisis of readiness with our military, achieving energy security and independence and checking the economic, cultural and military power of the Chinese Communist Party - becoming further entangled in a territorial dispute between Ukraine and Russia is not one of them.
"The Biden administration's virtual 'blank cheque' funding of this conflict for 'as long as it takes', without any defined objectives or accountability, distracts from our country's most pressing challenges."
Ukraine has responded to DeSantis' comments by inviting the politician to visit the war-ravaged nation.
Foreign ministry spokesman Oleg Nikolenko said: "We are sure that as a former military officer deployed to a combat zone, Governor Ron DeSantis knows the difference between a 'dispute' and a war.
"We invite him to visit Ukraine to get a deeper understanding of Russia's full-scale invasion and the threats it poses to US interests."
Tagged in Joe Biden