What scandal will get Clinton impeached? What grounds was he impeached on?

The resolution was "petitioning Congress to commence impeachment procedures" against Bush and Cheney for "high crimes and misdemeanors", including domestic spying, illegal detentions, signing statements, electioneering, the breaking of international treaties, and war crimes. He was impeached on State-level Democratic party actions.

Answer: The Monica Lewinsky Scandal

Explanation:

the House of Representatives approves two articles of impeachment against President Bill Clinton, charging him with lying under oath to a federal grand jury and obstructing justice.