Charges that threw Nixon out apply to Obama.  Life and Liberty PAC provides the following
examples:

HERE IS A SMALL LIST OF OBAMA'S CRIMES & COVER UP:

• CRIME
       – VOTER INTIMIDATION: 2008 The New Black Panthers
       used clubs and weapons at entrances to polling places threatening to use
       them against anyone who did not vote for Barack Hussein Obama II.
•  
  • COVER UP: Obama's Department of Justice
          halts all investigation into the New Black Panther case, and refuses to
          prosecute perpetrators.
• CRIME
       – VOTER FRAUD: 2008 Obama's former employer
       ACORN committed election fraud in multiple states registering children,
       dead people, and falsified names as Obama voters in the Presidential
       primary and general election.
•  
  • COVER UP: While some ACORN employees
          were convicted, they were convicted by state courts. The Obama Department
          of Justice refused to prosecute.
• CRIME
       – FALSIFICATION OF DOCUMENTS: 2011 Obama White House
       provided obviously and poorly forged documents and attempts to pass said
       documents off as Obama's long form birth certificate.
•  
  • COVER UP:Department of Justice ignores
          issue completely.