Republican strategist Lauren Claffey on Wednesday criticized President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE’s plan to impose new tariffs on Mexico over immigration, saying Trump needs to step up his efforts with lawmakers on finding a solution.

“Ultimately, we are responsible for our immigration problem and so Trump needs to work with Congress to reform the laws,” Claffey, a managing director at Hamilton Place Strategies, told Hill.TV.

“He’s failed a couple of times on actually getting Congress to move on this and that’s where he needs to be putting his effort,” she continued. “Putting this on Mexico that they’re going to somehow stem the migration from Central America and stop any people for us from coming into the country is just not a viable solution.”

Trump says he plans to move forward with his plans to gradually rise tariffs on Mexican goods to as much as 25 percent unless Mexico takes more steps to curb the influx of migrants coming through the country and trying to enter the U.S.

Claffey said that while Trump’s threat did successfully bring Mexico to the table for negotiations, she cautioned him not to follow through on his plans, saying the move would also hurt U.S. businesses whose supply chains are deeply intertwined with Mexico.

“If that was the sole goal of this — scare them, bringing them to the table, maybe it was successful,” she said. “But we don’t want to put tariffs on our allies, and especially Mexico, their economy and businesses are too intrinsically tied to the United States.”

Claffrey’s comments come as Senate Republicans prepare to break with Trump over his plan to impose tariffs on all exports from Mexico, possibly setting up a vote on a disapproval resolution that would block them.

“There is not much support in my conference for tariffs, that’s for sure,” Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellFEC flags McConnell campaign over suspected accounting errors Poll: 59 percent think president elected in November should name next Supreme Court justice Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' MORE (R-Ky.) said at a news conference just hours after Trump criticized Republicans efforts to thwart his plan.

—Tess Bonn