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WASHINGTON (Reuters) - U.S. House Speaker Nancy Pelosi said on Tuesday the House of Representatives will launch a formal inquiry into whether President Donald Trump should be impeached, declaring that no one is above the law.

The Democratic-controlled House will examine whether Trump sought Ukraine’s help to smear former Vice President Joe Biden, the front-runner for the 2020 Democratic presidential nomination, Pelosi said.

“Therefore today I’m announcing the House of Representatives is moving forward with an official impeachment inquiry,” she said.

“The president must be held accountable. No one is above the law,” Pelosi said.