President Trump's campaign has poured millions of ad dollars into issues that resonate with his base. Immigration was the driver. Now, it's impeachment.
Why it matters: This is a stark reflection of Trump's fight-like-hell gambit.
The big picture: It's not just Trump — this is a party-wide effort to cash in.
- The House and Senate Republican committees are also putting the majority of their digital ad dollars behind impeachment.
- In ads targeted to his home state of Kentucky, Senate Majority Leader Mitch McConnell, who's up for re-election next year, is running ads that say impeachment will fail "with me as majority leader."
The other side: Democrats continue to run ads about a wider array of topics, including health care, dark money, the Republican leadership and Trump.
Go deeper: Trump's burn-down-the-House plan