He's impeached. Under Art. I, Sec. 2, Clause 5, he was impeached on Dec 18, 2019. He will forever remain impeached. The Senate just decides if he stays in office or is removed. They can't reverse the impeachment.
US President Donald Trump has been impeached and now faces the next stage of a process that could, with enough support in Congress, see him removed from office. The Senate decides if he remains in office or is removed.
Pelosi will hand over the articles this week.
Even if the Senate fails to convict, a president is considered impeached but is not removed, as was the case with both Clinton in 1998 and Andrew Johnson in 1868. In Johnson’s case, the Senate fell one vote short of removing him from office on all three counts.