The Democratic-led US Senate was expected to vote early on Tuesday for final passage of a $95.34 billion aid package for Israel, Ukraine and Taiwan.

House Speaker Mike Johnson late on Monday sharply criticised a $95.3 billion aid package for Israel, Ukraine and other countries, casting serious doubts about the future of the package just as Senate leaders were slowly muscling it toward a final vote.

Senate leaders, trying to send a message that the US remains committed to its allies, were looking to overcome marathon speeches from a determined group of Republican senators and hold a vote to pass the bill in the early morning hours Tuesday.

But Johnson, a Louisiana Republican, said in a statement the package lacked border security provisions, calling it "silent on the most pressing issue facing our country.” It was the latest — and potentially most consequential — sign of opposition to the Ukraine aid from conservatives who have for months demanded that border security policy be included in the package, only to last week reject a bipartisan proposal intended to curb the number of illegal crossings at the US-Mexico border

"Now, in the absence of having received any single border policy change from the Senate, the House will have to continue to work its own will on these important matters,” Johnson said. "America deserves better than the Senate’s status quo.”

House Speaker Mike Johnson speaks during a meeting. File/AFP

The mounting opposition was just the latest example of how the Republican Party's stance on foreign affairs is being transformed under the influence of Donald Trump, the likely Republican presidential nominee.

Even if the package passes the Senate, as is expected, it faces an uncertain future in the House, where Republicans are more firmly aligned with Trump and deeply skeptical of continuing to aid Ukraine in its war against Russia.

As Republican Leader Mitch McConnell and 17 other GOP senators have provided the votes to ensure the foreign aid package stays on track to clearing the Senate, Johnson has shown no sign he will put the package up for a vote.

The legislation includes $61 billion for Ukraine, $14 billion for Israel in its war against Hamas and $4.83 billion to support partners in the Indo-Pacific, including Taiwan, and deter aggression by China.

It would also provide $9.15 billion in humanitarian assistance to civilians in Gaza and the West Bank, Ukraine and other conflict zones around the globe.

Republicans have demanded for months that the foreign aid bill include border restrictions.

But a bipartisan border deal, negotiated over the course of months, ran afoul of most Senate Republicans after Donald Trump, the party's leading White House candidate, rejected the agreement.

Schumer stripped the border security language from the bill last week.

Agencies