Legal experts said Trump's acceptance of a private plane from Qatar likely would violate the U.S. Constitution’s foreign emoluments clause.

WASHINGTON—Republican lawmakers on Tuesday expressed national-security concerns over the proposed $400 million plane that the Qatari ruling family wants to give to the U.S. for use as Air Force One, offering rare GOP resistance to a venture backed by President Trump.

By Richard Cowan and Patricia Zengerle WASHINGTON (Reuters) -Multiple congressional Republicans raised concerns about President Donald Trump's desire to accept a $400 million airplane from Qatar, as rival Democrats slammed the plan as an illegal foreign donation and national security threat.

As the Supreme Court hears arguments Thursday on a major Donald Trump policy for the first time in his second term, the president could secure a significant win affecting many of the lawsuits against his administration out of a case that is otherwise widely seen as a legal loser.

The Supreme Court will hear arguments on May 15 in a case challenging the Trump administration’s attempt to end automatic U.S. citizenship for children born to undocumented and temporary legal migrants.