put (someone or something) in jeopardy
To cause one to be in a situation or scenario that could prove risky, dangerous, or damaging. The colossal failure of our latest product has put the company's future in jeopardy. I hope you realize that you're putting your children in jeopardy by smoking inside the house like that.
put someone or something in(to) jeopardy
to put someone or something into danger. What you just said puts Bill into jeopardy. It puts his plans in jeopardy.