By His Own Standards, Attorney General Jeff Sessions Should Resign.

I don't think it is wrong for a senator to talk with the Russian ambassador. That alone would not even be suspicious. But it is a matter of public significance. This combined with other such matters add up to grounds for an investigation.

Meanwhile, for the attorney general nominee to lie about a matter of public significance in a confirmation hearing is inexcusable. Remember how Republicans impeached Bill Clinton for lying about whether he had sex with Monica Lewinsky)? That was a matter of no public significance whatsoever.