In Washington this week Donald Trump is expected to become only the third President in U.S. history to face impeachment proceedings.
A committee has already voted to press formal charges against Mr Trump over allegations he abused his power by trying to force Ukraine to investigate his political rival Joe Biden.
On Wednesday the Democrat-led House of Representatives will vote on whether the case should go to trial.
Impeachment has become a highly divisive election issue, not least in the key swing state of Wisconsin.
Sky’s US correspondent Amanda Walker reports.
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