Senate Minority Leader Charles SchumerCharles (Chuck) Ellis SchumerMcConnell says deficits 'not a Republican problem' Medicare for All is disastrous for American seniors and taxpayers Senate Dems race to save Menendez in deep-blue New Jersey MORE (D-N.Y.) on Wednesday doubled down on his criticism of President Trump in the wake of a terrorist attack in New York City.

"President Trump where is your leadership? The contrast between President Bush's actions after 9/11 and President Trump's actions this morning could not be starker," Schumer said from the Senate floor.

Schumer contrasted Trump's tweets with President George W. Bush's response after the 9/11 attacks, noting Bush invited Schumer and then-Sen. Hillary ClintonHillary Diane Rodham ClintonMueller's team asking Manafort about Roger Stone: report O'Rourke targets Cruz with several attack ads a day after debate GOP pollster says polls didn't pick up on movement in week before 2016 election MORE (D) to the White House.

"In a moment of national tragedy, President Bush understood the meaning of his high office. ... President Trump instead of politicizing and dividing America ... should be bringing us together and focusing on the real solution: anti-terrorism funding," Schumer said.

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The White House's proposed budget cut anti-terrorism grant funding. Schumer said on Wednesday that he wants Trump to rescind the proposed cuts.

Trump ripped the Senate's top Democrat in an early morning tweet over an immigration program that allowed the suspect in the attack, Sayfullo Saipov, to enter the United States. Eight people were killed on Tuesday when Saipov plowed a truck into bicyclists and pedestrians in lower Manhattan. Saipov was shot by police and is currently in custody.

Schumer immediately fired back on Twitter, saying: "I guess it's not too soon to politicize a tragedy."

Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeOn The Money: Treasury official charged with leaking info on ex-Trump advisers | Trump to seek 5 percent budget cut from Cabinet members | Mnuchin to decide by Thursday on attending Saudi conference Mnuchin to decide by Thursday whether to attend Saudi conference GOP senator: Not 'appropriate' for Mnuchin to go to Saudi conference MORE (R-Ariz.) also defended Schumer, noting that their 2013 immigration bill nixed the Diversity Visa Program.

Schumer said from the Senate floor that Tuesday's attack resonated personally with him as a New Yorker and that he had taken the bike path twice in the past month.

"My daughter went to the school near the scene ... and she used the bike path I don't know how many times. This is our territory, our home," he said.