WASHINGTON, April 23 (Reuters) - Billions of dollars in

foreign aid for Ukraine, Israel and Taiwan should easily win

approval in the U.S. Senate this week, after the House of

Representatives abruptly ended a months-long stalemate and

approved the assistance in a rare Saturday session.

The Senate on Tuesday will take up the package of four bills

passed by the House, one providing $61 billion for Ukraine, a

second with $26 billion for Israel, a third with $8.12 billion

"to counter communist China" in the Indo-Pacific and a fourth

that includes a potential ban on the social media app TikTok,

measures for the transfer of seized Russian assets to Ukraine

and new sanctions on Iran.

The package could pass the Democratic-led Senate as soon as

late Tuesday. Democratic President Joe Biden has promised to

sign it quickly into law.

Two U.S. officials told Reuters the administration was

already preparing a $1 billion military aid package for Ukraine,

the first to be sourced from the bill.

That would clear the way for shipments of military

assistance to Ukraine within days, boosting morale for its

troops fighting Russian invaders. The influx of weapons should

improve Kyiv's chances of averting a major Russian breakthrough

in the east, analysts said, although it would have been more

helpful if the aid had come closer to when Biden requested it

last year.

"I ask my colleagues to join together to pass the

supplemental today as expeditiously as possible, send our

friends abroad the aid they have long been waiting for," Senate

Democratic Majority Leader Chuck Schumer said in a speech as the

Senate opened.

As he urged support, Republican leader Mitch McConnell

said failing to support allies emboldened rivals like China and

Russia, and denounced isolationism. "Today, the Senate sits for

a test on behalf of the entire nation. It's a test of American

resolve, our readiness, and our willingness to lead," he said.

It was not immediately clear how the money for Israel

would affect the conflict in Gaza - Israel already receives

billions of dollars in security assistance from the United

States. The package includes humanitarian assistance, which

supporters hope will help Palestinians in Gaza.

HUMANITARIAN CONCERNS

The Israel bill passed the House by an overwhelming 366 to

58 - with 21 Republicans and 37 Democrats opposed. The

Republican "no" votes came from hardliners who generally oppose

foreign aid. Democrats who voted no said they wanted more done

to ease the devastating humanitarian toll of Israel's campaign

in Gaza as it retaliates for the Oct. 7 attacks by Hamas

fighters that killed 1,200 people and resulted in around 250

being taken hostage.

The Israeli military assault that followed those attacks has

killed more than 34,000 people in Gaza, according to Gaza health

authorities.

The Senate passed security aid for Ukraine, Israel and the

Indo-Pacific more than two months ago, with support of 70% of

the 100-member chamber, both Republicans and Democrats.

The White House said Biden told Ukrainian President

Volodymyr Zelenskiy in a phone call on Monday that his

administration would provide new security assistance "to meet

Ukraine's urgent battlefield and air defense needs" as soon as

he signs the supplemental spending bills into law.

The legislation's progress has been closely watched by

industry, with U.S. defense firms up for major contracts to

supply equipment for Ukraine and other U.S. partners. Backers of

the foreign assistance stress that approving the Ukraine bill

would create many American jobs.

Experts expect the supplemental spending to boost the

order backlog of RTX along with other major companies

that receive government contracts, such as Lockheed Martin ( LMT )

, General Dynamics ( GD ) and Northrop Grumman ( NOC ).

Congressional aides said the funding for Ukraine

includes $8 billion in Presidential Drawdown Authority, which

lets Biden send equipment to Ukraine from U.S. stocks.

The House passed the Ukraine funding by 311-112, with all

112 "no" votes coming from Republicans, many of whom were

bitterly opposed to providing further assistance to Kyiv. Only

101 Republicans voted for it, forcing Speaker Mike Johnson to

rely on Democratic support and prompting calls for his ouster as

House leader.

However, the House left Washington for a week-long recess,

without triggering a vote to remove Johnson.