The Biden administration will send a new $300 million aid package to Ukraine, White House national security adviser Jake Sullivan said Tuesday.

The arms shipment is the first in months to Kyiv and will include anti-aircraft missiles, ammunition, artillery rounds and armored vehicles, Mr. Sullivan told reporters at the daily White House press briefing.

Mr. Sullivan’s announcement comes as Republican lawmakers have blocked President Biden’s request for a $60 billion package in aid. Some Republicans including former President Donald Trump, the presumptive GOP presidential nominee, say the U.S. has already sent too much money to Ukraine while funds are needed at home to secure the U.S. border.

Mr. Sullivan said the Biden administration was able to scratch up the cash through recent cost savings on purchases by the Pentagon.

Still, Mr. Sullivan said the relatively minor aid package isn’t enough and called on Congress to pass more aid “as soon as possible.”

“This ammunition will keep Ukraine‘s guns firing for a period, but only a short period,” he said. “This should not replace the bipartisan national security bill. It is nowhere near enough to meet Ukraine‘s battlefield needs and it will not prevent Ukraine from running out of ammunition.”

The administration has increasingly pressed House Speaker Mike Johnson, Louisiana Republican, to bring the aid bill, which also includes funding for Israel and Taiwan, to the floor for a vote.

The last drawdown from the U.S. was in December, when funds to replenish stocks fell to zero.

Since Russia invaded Ukraine in February 2022, the U.S. has sent about $75 billion in military and humanitarian assistance.

• Jeff Mordock can be reached at jmordock@washingtontimes.com.