Allen Weisselberg, the former chief financial officer of the Trump Organization, is expected to plead guilty to perjury charges on Monday in connection to testimony he gave during former President Donald Trump’s civil fraud trial, according to three sources familiar with the matter.Weisselberg was not expected to enter into a cooperation agreement with the plea that would require his testimony at any future trial, one source familiar with the matter said. Weisselberg arrived at the Manhattan district attorney’s office before 7 a.m. and is expected to make the plea this morning. An…