The latest US congressional leaders to vote against US assistance to Israel are Ben Zynier and Paul Ryan.
The former House Speaker and US senator, respectively, both voted against the $3.8bn aid package for Gaza, a move that drew criticism from Israel.
Israel said it would not allow the US to continue its “unconstitutional” aid to the Palestinian territory.
“The president has declared war on us, and the president is acting illegally and unconstitutionally,” said Mr Zyner.
It was not immediately clear whether the US senators voted against it.
Senator Rand Paul’s office said he did not vote against the aid package.
Earlier, Mr Zyl said the US should stop supporting Israel.
“The American people have no trust in the US Senate, the US Congress, and I do not believe that our politicians should be elected by the American people,” he said.
US Representative Paul Ryan voted in favour of the aid bill.
Mr Zynielewski was elected to the US House of Representatives in 2009.
He is one of a number of Republican politicians to have publicly opposed US aid to Israel.