House Democrats are adding a dozen Republican-held seats to their list of targets for the November midterms, expanding the national campaign map to districts Donald Trump won easily less than two years ago.

The move brings the Democratic Congressional Campaign Committee’s list of targets to 58, an ambitious list that reflects Trump’s diminished standing with the electorate and Democrats’ belief that they can capitalize on voters’ frustrations over the economy, the war in Iran and the chaotic nature of the Republican president’s second administration.