Democrats are winning the war over the wall.

Despite President Trump’s request for more than $1 billion to fund the Mexican border wall this year, GOP leaders are expected to exclude the money in the spending bill being prepared to keep the government open beyond April 28.

Speaker Paul Ryan Paul Davis RyanAt indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates Peterson faces fight of his career in deep-red Minnesota district MORE (R-Wis.) says the choice is pragmatic and the money will come later.

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But the issue has become a political thorn in the side of GOP leaders who are facing pushback from Republicans voicing concerns over the diplomatic fallout, the disruption to local communities and the enormous cost of the project, estimated to be anywhere from $22 billion to $40 billion.

With Democrats united against new wall funding, it’s unlikely the Republicans have the votes to get it through and prevent a government shutdown.

Among the loudest GOP skeptics are those representing border districts. Reps. Will Hurd (R-Texas) and Martha McSally (R-Ariz.), for instance, hail from districts that span a combined 880 miles of the U.S.-Mexico border. They’re pressing the administration to justify the huge costs.

“We recognize the need for robust border security and infrastructure to ensure public safety and increase cross border commerce,” the lawmakers wrote recently to top administration officials. “We also have an obligation to be good stewards of taxpayer dollars.”

Grover Norquist, a conservative anti-tax crusader who has supported comprehensive immigration reform, told The Hill that payment for the wall has not been an issue in his discussions with allies on Capitol Hill.

And some Republicans are concerned that deteriorating relations with Mexico may be too high a price to pay for the wall.

In a Senate Homeland Security Committee hearing Wednesday, Sen. John McCain John Sidney McCainKelly's lead widens to 10 points in Arizona Senate race: poll COVID response shows a way forward on private gun sale checks Trump pulls into must-win Arizona trailing in polls MORE (R-Ariz.) expressed concern to Homeland Security Secretary John Kelly about a growing resentment in Mexico over the administration's border policies.

“There is a lot of anti-American sentiment in Mexico. If the election were tomorrow in Mexico, you'd probably have a left-wing, anti-American president in Mexico. That can't be good for America,” McCain said.

“It would not be good for America, or for Mexico,” Kelly conceded.

The thinly veiled reference to Andrés Manuel López Obrador, who tops most polls in the lead-up to Mexico’s upcoming 2018 presidential election, raised eyebrows in Mexico.

Mexican Foreign Affairs Secretary Luis Videgaray told Kelly in Washington Thursday that Mexico “expects the United States to respect the Mexican electoral process.”

Videgaray added that, although Mexico considers the wall an “unfriendly gesture,” it is “not part of a bilateral discussion and it shouldn’t be.”

Democrats have latched on to Mexico's consistent denial that the country will pay for a border wall — various officials and former officials have panned the notion since Trump first brought it up during the campaign — to take swings at the president.

“It's anywhere between $26 billion and $40 billion to build it, you can't drive on it, you can't use it for anything, it doesn't do anything to drive economic growth and jobs in America beyond the building of a wall itself, and it probably wouldn't be built using union jobs to begin with,” said Rep. Joseph Crowley (N.Y.), chairman of the House Democratic Caucus.

In its budget request, the White House had sought $1.4 billion in 2017 funds for the wall. But hoping to prevent a government shutdown, Ryan has suggested the Republicans will largely delay the wall funding debate until September, when Congress takes up spending bills looking ahead to fiscal 2018.

“The big chunk of money for the wall, really, is ... next fiscal year’s appropriations, because they literally can’t start construction even this quickly,” he told “CBS This Morning” last week.

Democrats are encouraged by those comments, but in the absence of specific legislation they remain leery that some Republicans, particularly those in the White House, will continue to push for wall provisions in the 2017 package.

House Minority Leader Nancy Pelosi (D-Calif.) said she’s hopeful the Republicans will punt on the issue, citing recent polls indicating that voters are largely opposed.

“I would hope that they wouldn't try that because … the American people don't even support it,” she told reporters Thursday.

A Pew Research poll released in February found that 67 percent of voters oppose the wall, and only 35 percent support it.

Last month, Pelosi visited the border region in Texas and warned that the wall would damage communities without benefiting public safety.

“It's about commerce. It's about community. It's about family. It's about education. It's about the environment. It's about so many things,” she said. “So to put a wall there is really an insult and really an ineffective insult at that.”

In Texas, where much of the land along the Rio Grande is privately owned, the wall has met resistance from many locals, regardless of party affiliation.

Landowners have long fought the federal government exercising eminent domain to acquire land for border fencing. Plus, the river's natural floodplain would require the wall to be built well north of the border, leaving some land on the Mexican side of the wall.

Land acquisition is less of a concern in other border states, where much of the land is owned by the federal government and, except for a short span on the Colorado River, the border crosses dry land.

Still, past administrations have found a double duty for the wall in some sectors by building border fencing atop levees that protect communities from floods.

In anticipation of potential litigation over border land, Trump's Department of Justice budget request for 2018 included funding for “20 attorneys to pursue Federal efforts to obtain the land and holdings necessary to secure the Southwest border and another 20 attorneys and support staff for immigration litigation assistance.”

But focus is on the Homeland Security budget that provides for physical construction of the wall. And in that debate, the wildcard remains the question of how hard Trump will push fellow Republicans to help him make good on the central pillar of his campaign.

Democrats see the White House as the biggest threat to a spending deal this month.

“House and Senate Democrats and Republicans have been making very good progress on an appropriations package to fund the government,” Matt House, spokesman for Senate Minority Leader Charles Schumer Chuck SchumerDemocrats scramble on COVID-19 relief amid division, Trump surprise Pelosi, Schumer 'encouraged' by Trump call for bigger coronavirus relief package Schumer, Sanders call for Senate panel to address election security MORE (D-N.Y.), said Friday.

“The only thing that could derail that progress is the White House insisting on their extraneous demands, which would meet bipartisan opposition.”