Has rob reiner endorsed or campaigned for any candidates specifically because of his opposition to trump?

1. Reiner’s history of endorsements and political activity

Reiner’s political résumé in the public record includes explicit endorsements and large-scale advocacy: he supported Howard Dean’s 2004 presidential bid and endorsed Hillary Clinton in 2008 and again in 2015, and he founded and financed the American Foundation for Equal Rights to fight California’s Proposition 8, pouring significant resources into the campaign and subsequent litigation that reached the Supreme Court ^[1]. Those documented endorsements predate Donald Trump’s presidential rise and were tied in reporting to mainstream Democratic politics and civil‑rights causes rather than to an articulated anti‑Trump crusade ^[1].

2. Reiner as an outspoken critic of Trump in later years

Multiple outlets report that Reiner became an outspoken critic of Donald Trump during and after Trump’s first term, publicly describing Trump as “mentally unfit” in 2017 and warning in 2025 that Trump’s media influence posed a threat to the country — positions that put him squarely in the public eye as an anti‑Trump voice ^{[2] [3]}. News coverage of the aftermath of Reiner’s death repeatedly cites his longtime status as a liberal activist and notes his recent warnings about Trump’s impact on American democracy, documenting a clear pattern of public opposition ^{[1] [4]}.

3. Evidence connecting endorsements or campaigning specifically to opposition to Trump

The sources enumerate Reiner’s past endorsements and his vocal anti‑Trump posture, but none record Reiner saying he supported any given candidate explicitly “because of” opposition to Trump or as a single‑issue, anti‑Trump act; instead, the documented endorsements occurred in contexts tied to Democratic politics and civil‑rights activism ^[1]. Contemporary reporting shows Reiner campaigned and spoke against Trump rhetorically ^{[2] [3]}, but the reporting does not supply a direct quote or campaign filing where Reiner frames a particular endorsement as motivated primarily or solely by anti‑Trump animus ^{[1] [2]}.

4. Alternative readings and implicit motives in the record

An alternative but plausible reading—supported indirectly by the timeline and Reiner’s outspoken criticisms—is that his later campaigning and public advocacy increasingly focused on opposing Trump’s policies and rhetoric, making opposition to Trump an element in his political activity even if not the sole explicit rationale for specific endorsements ^{[2] [5]}. Journalistic accounts show he sounded alarms about Trump’s influence and repeatedly clashed with the president in public fora, which suggests anti‑Trump sentiment informed his public activism even when endorsements trace to longer‑standing Democratic commitments ^{[3] [5]}. That interpretation, however, relies on inference from his broader record rather than on a documented declaration linking an endorsement exclusively to anti‑Trump motives ^{[1] [2]}.

5. Conclusion — answer to the specific question

Factually: Rob Reiner has endorsed and campaigned for Democratic candidates (notably Howard Dean in 2004 and Hillary Clinton in 2008 and 2015) and has been an outspoken critic of Donald Trump in recent years ^{[1] [2]}. The reporting provided does not contain a direct, on‑the‑record instance in which Reiner says he endorsed or campaigned for a particular candidate explicitly “because of his opposition to Trump”; instead, his endorsements and activism are documented separately from his vocal anti‑Trump commentary, leaving room for reasonable interpretation but no definitive sourced claim tying a specific endorsement solely to an anti‑Trump motive ^{[1] [2]}.