WASHINGTON (Reuters) - They might not have agreed with the U.S. president calling Germany a “captive” of Russia, but some Republican lawmakers on Wednesday said they believe Donald Trump is right to shame one of America’s most important allies into spending more on defense.

FILE PHOTO: Speaker of the House Paul Ryan speaks with reporters during his weekly news conference on Capitol Hill in Washington, U.S., June 21, 2018. REUTERS/Aaron P. Bernstein

The Republican president, in Brussels for the NATO summit, took a swipe at Germany for supporting a new pipeline for Russian gas, saying at a pre-summit meeting: “We’re supposed to be guarding against Russia and Germany goes out and pays billions and billions of dollars a year to Russia.”

Trump kept up his assault on NATO members, particularly Germany, for failing to spend a target two percent of national income on defense, a goal they must meet by 2024. He told fellow leaders he would prefer a 4 percent target, closer to the 3.6 percent of GDP the United States spends on defense.

While Democratic congressional leaders condemned Trump’s attacks on Germany as “brazen insults and denigration of one of America’s most steadfast allies,” Republicans took a more benign view, and some backed him outright.

“I think the president is right to raise the issue of whether they’re meeting their responsibilities to NATO and whether they are perhaps pulling their punches with regard to their support for NATO because of their dependency” on Russia, said Senator John Cornyn, the No. 2 Republican in the Senate.

Asked about Trump calling Germany Russia’s “captive,” Cornyn said: “I would not choose that word but I understand what he’s getting at.”

House of Representatives Speaker Paul Ryan said NATO is indispensable, but Trump was right to point out that Germany and other allies must keep their commitment to increase spending on defense.

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“Germany is the largest economy in the EU. Germany should be committing two percent to defense like they agreed to,” Ryan told reporters.

Germany invested 1.24 percent of its GDP in 2017 and estimated to do the same in 2018. While Germany’s spending is increasing, it will not reach the target by 2024, instead expecting to boost spending to 1.5 percent by 2025.

While U.S. defense spending makes up 70 percent of combined allied governments’ military budgets, just 15 percent of U.S. expenditure is spent in Europe on NATO-related defense.

Senator John Barrasso, a Republican member of the Foreign Relations Committee, threw his support behind Trump’s hard line,

“The president is going to mention the fact that Europe is becoming more and more dependent on Russia for their energy sources, specifically Germany with their invitation to the Nord Stream 2 pipeline,” Barrasso told Fox News. “I have been fighting it all the way through.”

Trump took issue with Nord Stream 2, a new $11-billion pipeline to bring Russian gas across the Baltic Sea that Berlin has supported despite qualms from other EU states. German Chancellor Angela Merkel insists the project is a private commercial venture.

Republican Senators Bob Corker and Lindsey Graham also expressed concern about the pipeline.

“I don’t understand why Germany would be so in favor of supporting that particular supply source instead of diversifying,” said Corker, the chairman of the Senate Foreign Relations Committee.

Both Corker and Graham, however, hoped Trump would let allies know that NATO is valuable to the United States and needs to be protected and strengthened.

“The alliance is very important and I think there’s ways of communicating our displeasure with things without trying to insult and break the alliance apart,” said Corker.

To underscore support for NATO, the Senate and House both voted for resolutions supporting the alliance on Tuesday and Wednesday. Corker’s foreign relations committee also voted for a pro-NATO measure on Wednesday.