The testimony of an American diplomat came to flesh out the investigation for a rare procedure of dismissal against Donald Trump.

The White House denounced Tuesday a "slanderous campaign" against Donald Trump after the testimony before the Congress of a US diplomat posted in Kiev, reinforcing the suspicions against the President of the United States in the Ukrainian case.

Suspicions of "abuse of power"

"President Trump has done nothing wrong, it is a campaign of slander by far-left politicians and unelected radical bureaucrats who are at war with the Constitution," Stephanie said. Grisham, spokesman for the US executive.

US congressional Democrats suspect the president of abusing his power by pressuring Ukraine to investigate his political rival Joe Biden. They suspect him of having conditional on these investigations the granting to Kiev of a military aid of several hundreds of millions of dollars.