President TrumpDonald John TrumpNational Archives says it altered Trump signs, other messages in Women's March photo Dems plan marathon prep for Senate trial, wary of Trump trying to 'game' the process Democratic lawmaker dismisses GOP lawsuit threat: 'Take your letter and shove it' MORE said his order to launch the drone strike that killed Iranian Gen. Qassem Soleimani came amid pressure from Senate Republicans he views as key allies in his upcoming impeachment trial, The Wall Street Journal reported and The New York Times reported this week.

The articles did not name the GOP senators, but many of Trump's allies in the Senate, including Sen. Lindsey GrahamLindsey Olin GrahamSenate GOP mulls speeding up Trump impeachment trial Democratic group plans mobile billboard targeting Collins on impeachment Paul predicts no Republicans will vote to convict Trump MORE (R-S.C.), have praised his decision to take out the Quds Force commander in Baghdad.

Graham, an Iran hawk who is also chairman of the Senate Judiciary Committee, has been outspoken in his support of Trump's strike on Soleimani and in his opposition to Trump's impeachment.

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The New York Times reported that Trump said on a phone call that he had been under pressure by some Senate Republicans to take a harder line on Iran.

Though many GOP senators have voiced their support for Trump's actions in Iraq, three House Republicans on Thursday voted with Democrats on a measure to limit the president's military powers. Among them was Rep. Matt GaetzMatthew (Matt) GaetzGaetz in Twitter battle with Florida House Republican Apple under pressure to unlock Pensacola shooter's phones Conservatives slam Warren's call to put transgender women in women's prisons MORE (R-Fla.), one of the president’s biggest supporters during the House impeachment hearings.

Some Senate Republicans have also pushed back on Trump's military authority. Sen. Rand PaulRandal (Rand) Howard PaulGOP threatens to weaponize impeachment witnesses amid standoff Paul predicts no Republicans will vote to convict Trump Graham on impeachment trial: 'End this crap as quickly as possible' MORE (R-Ky.) in particular has questioned the administration's use of a 2002 authorization as the basis for the drone strike in Baghdad that killed Soleimani.