His broadsides triggered an outcry from Democrats in Washington and officials on the island, which has been reeling since Hurricane Maria struck three weeks ago, leaving death and destruction in an unparalleled humanitarian crisis.
The bill combines $18.7 billion for the Federal Emergency Management Agency with $16 billion to permit the financially troubled federal flood insurance program pay an influx of Harvey-related claims. Ryan is set to visit Puerto Rico on Friday.
"We have gone all out for Puerto Rico", Trump said at that meeting with Puerto Rico officials, including Cruz.
Others, including House Majority Leader Nancy Pelosi, D-San Francisco, and Puerto Rican mayor Carmen Yulin Cruz, also pleaded with Trump to not abandon the island, home to 3.4 million USA citizens.
In one out of a series of tweets, Warren said, "It is outrageous that @realDonaldTrump is making veiled threats to withdraw relief workers from USA citizens in need". Puerto Rico's sole representative in Congress, Jenniffer Gonzalez-Colon, and House GOP Conference Chairwoman Rep. Cathy McMorris Rodgers also will be part of the congressional delegation.
Maria slammed into Puerto Rico as the island was already struggling with a severe financial crisis, which forced the government to file for bankruptcy in May.
"Mr. President, you seem to want to disregard the moral imperative that your administration has been unable to fulfill", Cruz said in a statement.
The governor's office did not respond to queries about the total amount of aid requested, which is now equivalent to around half of Puerto Rico's debt of some US$73 billion.
Trump criticized the US territory in a series of tweets Thursday.
"We can not keep FEMA, the Military & the First Responders, who have been incredible (under the most hard circumstances) in P.R. forever!", Trump tweeted, in one of a series of morning posts expressing frustration with the situation in the USA territory of 3.4 million people. The death toll in Florida after Hurricane Irma, which made landfall on September 10, also reached 75, the Miami Herald reported, not counting the more than 38 people who died in the Caribbean. Authorities told CNN on Wednesday that the death toll had gone up to 45, but at least some 113 people were still unaccounted for.
Thursday's hurricane aid package totals $36.5 billion and follows a $15.3 billion measure that passed last month.