KEY POINTS
  • President Trump decided on his Supreme Court pick as of Monday afternoon, a source tells CNBC, but the name of the nominee wasn't made public.
  • America First Policies is preparing to unveil a seven-figure ad campaign to back Trump's choice to replace the retiring Justice Anthony Kennedy.
  • Trump plans to announce his nominee at 9 p.m. ET on Monday.
Sen. Heidi Heitkamp, D-N.D., left, listens as President Donald Trump speaks in the Roosevelt Room of the White House in Washington. 

A pro-Trump organization is getting ready to go to war in support of President Donald Trump's Supreme Court nominee, with a plan targeting Democratic senators in red states.

America First Policies is preparing to unveil a seven-figure ad campaign to back Trump's choice, whomever it is, to replace the retiring Justice Anthony Kennedy, according to Erin Montgomery, the group's spokeswoman.