Trump Pledges 'Biggest Tax Cut Ever' , If He's Re-Elected .While under supervision at the Walter Reed National Medical Center.President Trump , posted a series of tweets Monday morning.Previously, Trump said he would give tax breaks to U.S. companies that bring operations back from China.cut the top capital gains tax rate to 15%, forgive temporarily deferred payroll taxes and more.Biden, if elected, intends to raise taxes , for corporations and "anybody making over $400,000."