Washington (CNN) House Speaker Nancy Pelosi said Monday if President Donald Trump vetoes the resolution blocking his national emergency declaration, Democrats will respond in Congress and in court.

"We'll fight him in the Congress, we'll fight him in the courts and we'll fight him in the court of public opinion," Pelosi told reporters at an event in Texas. "What he's doing is wrong and the Republicans know it."

The Senate likely has enough votes to pass a measure blocking Trump's efforts to build a wall on the US southern border through emergency powers. With Republicans controlling 53 seats in the chamber, Senate Democrats need four GOP votes for the measure to pass, and Republican Sens. Rand Paul of Kentucky, Susan Collins of Maine, Lisa Murkowski of Alaska and Thom Tillis of North Carolina have indicated they will vote in favor of the resolution.

Trump has vowed to veto the measure, which was introduced in the House and passed the chamber last week , with 13 Republicans voting with Democrats.

Pelosi's comments show Democrats have no plans to back down from the fight against allocating billions of dollars for the border wall, which Trump has pursued in fervor as his top domestic priority.

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