Senate Democrats on the Homeland Security and Governmental Affairs committee released a report Tuesday estimating a $70 billion price tag for a concrete wall along the U.S.-Mexico border.

Additionally, the Democrat members say that estimate doesn't include other pricey items that would be necessary, like land acquisition and handling numerous lawsuits that would be certain to crop up. They also claim the costs of creating the border wall are increasing every year.

Cost estimates from the report were assembled using numerous documents and breifings given by Customs and Border Patrol.

The construction of a barrier along the border was a central plank of the Trump campaign, and after the inauguration, President Trump signed an executive order on January 25 ordering its creation.

Homeland Security Secretary John Kelly told the full committee earlier this month that he "had a lot of elbow room" when it came to the types of barriers used in the makeup of the wall, which might also provide DHS with cost flexibility. Other than a pure physical border, Kelly also said other technologies like drones could also be a part of the border-security program.

Furthermore, Interior Secretary Ryan Zinke recently told the Public Lands Council that parts of the border wall shouldn't be built on the American side.

The Democrats' report was also critical that no cost-benefit analysis of the wall has been completed yet, and estimates that annual maintenance will take about $150 million per year.

In February, a Reuters report placed the cost of the border wall at about $21 billion and taking three and a half years to finish.

After hearing about the report, President Trump responded via Twitter.

"I am reading that the great border WALL will cost more than the government originally thought, but I have not gotten involved in the ... design or negotiations yet," Trump tweeted in February. "When I do, just like with the F-35 FighterJet or the Air Force One Program, price will come WAY DOWN!"