The resolution would be binding. Congress can terminate the declared emergency with a joint resolution (see 50 U.S. Code § 1622 - National emergencies). A 2/3 vote is needed to override a veto. All Democrats together with about 1/3 of Republicans can terminate the declared emergency.

The "national emergency posed by the large and persistent trade deficit" was declared on April 2, 2025.

House of Reps.  seats  votesNeeded  percent
  Republican     220       73         33%
  Democratic     213       213        100%
    total        433       286        66%

This possible vote exerts political pressure to lower the tariffs. Congress can lower tariffs, and avoid the recession that high tariffs will cause.

=== links ===

Congress has the power to halt Trump’s tariffs. But Republicans aren’t ready to use it, April 4, 2025
"McConnell and three other Republicans joined with Democrats this week to help pass a resolution that would nullify Trump’s tariffs on Canada, sending a rebuke to the president just hours after his “Liberation Day” announcement. But House Speaker Mike Johnson quickly indicated he has no interest in giving the resolution a vote. Lawmakers’ struggle to act showed the divide among Republicans on trade policy, with a mostly younger group of Republicans fiercely backing Trump’s strategy. Rather than heed traditional free trade doctrine, they argue for “America First” protectionism and hope it will revive U.S. manufacturing."
apnews.com - Trump tariffs republicans senate house

‘Economic sabotage’: Mass. Sen. Warren rolls out bipartisan plan to repeal Trump’s tariffs, April 08, 2025
masslive.com - Economic sabotage mass sen warren rolls out bipartisan plan to repeal trumps tariffs

International Emergency Economic Powers Act
50 U.S. Code § 1706 (b) Congressional termination of national emergencies by concurrent resolution
"The authorities described in subsection (a)(1) may not continue to be exercised under this section if the national emergency is terminated by the Congress by concurrent resolution pursuant to section 202 of the National Emergencies Act [50 U.S.C. 1622] and if the Congress specifies in such concurrent resolution that such authorities may not continue to be exercised under this section."
law.cornell.edu: 50 U.S. Code § 1706 - Savings provisions | U.S. Code | US Law