Senate Minority Leader Charles SchumerCharles (Chuck) Ellis SchumerRed-state Dem tells Schumer to 'kiss my you know what' on Supreme Court vote Dem infighting erupts over Supreme Court pick Trump's latest win: More Americans are saying, 'I quit!' 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 ClintonHillary Clinton to Trump ahead of Putin summit: 'Do you know which team you play for?' 10 things we learned from Peter Strzok's congressional testimony Get ready for summit with no agenda and calculated risks 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 FlakeThe Hill's Morning Report — Trump readies for Putin summit: 'He’s not my enemy’ Overnight Defense: Fallout from tense NATO summit | Senators push to block ZTE deal in defense bill | Blackwater founder makes new pitch for mercenaries to run Afghan war On The Money — Sponsored by Prudential — Lawmakers demand answers from Mnuchin on tariffs | Fed chief lays out stakes of Trump trade war | Consumer prices rise at highest rate in six years | Feds to appeal AT&T merger ruling 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.