PALM BEACH, Fla. - Former President Donald Trump on Monday established an official post-presidency office in Palm Beach County, Florida to oversee his affairs, Fox News has learned.A statement from Trump’s office said the "Office of the Former President" will be responsible for his "correspondence, public statements, appearances, and official activities.The Office will also "advance the interests of the United States and … carry on the agenda of the Trump Administration through advocacy, organizing, and public activism."The announcement comes as Democrats marched the impeachment case against Trump to the Senate Monday night for the start of his historic trial.