Matt McClain/The Washington Post via Getty Images; Brandon Bell/Getty Images
- Michael Cohen began his testimony Monday in the NY 'hush money' grand jury that may indict Trump.
- He said he felt 'a little twisted, inside' as he entered the Manhattan building where the grand jury meets.
- Cohen's testimony could last several days and lead to a felony falsifying business documents charge.
Michael Cohen is testifying Monday before the secret Manhattan grand jury that is weighing a possible indictment of Donald Trump.