America First Policy Institute senior fellow Steve Yates has claimed that China and Russia have a "six-month window" to wreak havoc on America, ahead of the US election.
The relationship between the US, Russia and China has been strained over the past few years and has heightened as the US supports Ukraine after the Russian invasion.
The senior fellow claimed that the chaos in US politics could have disastrous consequences.
Speaking to GBN America, Yates said: "When Prime Minister [of Israel] Netanyahu was visiting the United States, Joe Biden had a relatively brief public meeting with the visiting Prime Minister, and then the Vice President had a meeting and she gave the press response afterwards.
"That seems to reinforce the notion that an untested Vice President is already acting President.
Steve Yates gave the US a dire warning
GBNA
"And so there's this combination where if you're an aggressor, you might look at the next six months as a window to seek an advantage.
"I hope that's not how our adversaries are going to act for the sake of America or the interest of our allies, for that matter. But I'm quite concerned that impression is real."
LATEST DEVELOPMENTS:
It comes as Ukraine's air force said on Wednesday it shot down all 89 drones and one missile launched by Russia overnight in one of the war's largest drone attacks.
Russia's attack mainly targeted the central region of Kyiv where the local authorities said the air force shot down more than 40 drones.
Since sending thousands of troops into Ukraine on February 24, 2022, President Vladimir Putin has repeatedly said Russia could use nuclear weapons to defend itself in extreme situations, comments that the West has dismissed.
US Defence Secretary Lloyd Austin said the United States was concerned also about advances by Russia in Ukraine, to which US security assistance would continue.
Joe Biden announced he will not be seeking re-election last week
PANetanyahu's meetings at the White House came a day after he gave a heated speech to Congress and promised "total victory" against Hamas, as thousands of pro-Palestinian protesters demonstrated outside.
The Prime Minister faces pressure both at home and abroad to bring an end to the Israel-Hamas war.
Biden's support of Israel has infuriated many left-wing activists, whose support the Democrats may need if they are to win November's presidential election.
Kamala Harris is set to become the official Democrat election nominee after Joe Biden stepped down on SundayGettySpeaking after meeting the Prime Minister of Israel, Harris said she had an "unwavering commitment" to Israel and its right to defend itself.
She said: "Israel has a right to defend itself. And how it does so matters,
"We cannot allow ourselves to be numb to the suffering and I will not be silent," she said.
"Let's get the deal done so we can get a ceasefire to end the war. Let's bring the hostages home, and let's bring much-needed relief to the Palestinian people."