"We will not fund states that allow anarchy," she told reporters.
The federal government remains closed amid a bitter impasse on Capitol Hill over competing congressional spending bills.
President Donald Trump and Republicans have cast blame for the shutdown on Democrats' health care demands, while Democrats insist Republicans need to negotiate.
The Trump administration has threatened mass layoffs of some federal workers during the shutdown.
President Donald Trump noted Hamas still needs to respond to his plan to end the war in Gaza.
"We're relying on the countries that I named and others to deal with Hamas, and I'm hearing that Hamas wants to get this done, too," he said.
Trump said it's possible that Hamas rejects the deal but added, "I have a feeling that we're going to have a positive answer."
After holding a bilateral meeting with Israeli Prime Minister Benjamin Netanyahu, President Donald Trump said this is "potentially one of the great days ever in civilization."
Trump said he and Netanyahu have "worked well together" and that the prime minister has "agreed" to the president's 20-point plan to end the war in Gaza.
Before President Donald Trump and Israeli Prime Minister Benjamin Netanyahu held a press conference following their bilateral meeting, the White House released Trump's "Comprehensive Plan to End the Gaza Conflict."
Some of the 20 points included in the plan state that Gaza "will be a deradicalized terror-free zone that does not pose a threat to its neighbors" and that Gaza will be "redeveloped for the benefit of the people of Gaza, who have suffered more than enough."
The plan also states that if both sides agree to this proposal, "the war will immediately end."
Within 72 hours of Israel publicly accepting this agreement, "all hostages, alive and deceased, will be returned," the plan states."
President Donald Trump welcomed Israeli Prime Minister Benjamin Netanyahu to the White House on Monday, where the two will discuss the ongoing war in the Gaza Strip.
While standing next to Netanyahu, Trump told reporters he is "very confident" there will soon be peace in Gaza.
The two leaders shook hands and waved to cameras before walking into the White House.
