Legislation supported by Trump and Congressional Republicans is projected by the Congressional Budget Office to cause between approximately 11.8 million and 13.7 million people to lose health insurance, primarily due to Medicaid and ACA marketplace cuts.
Trump voters kicked 13 million people off health insurance.

FactVerify
Source: factverify.com
Key Evidence
The Congressional Budget Office projects that Republican-backed legislation associated with President Trump would cause between 11. 8 million and 13. 7 million Americans to lose health insurance primarily through Medicaid and ACA cuts.
pbs.orgpbs.orgWho would be affected by health care cuts in Senate version of Trump’s budget...
These estimates come from nonpartisan analyses based on proposed bills.
What the Evidence Shows
The claim that 'Trump voters kicked 13 million people off health insurance' can be broken down into several components: first, the number of people losing insurance; second, the causal link to policies supported by Trump and his Republican allies; and third, the attribution specifically to 'Trump voters.'
Regarding the number, multiple credible sources including the nonpartisan Congressional Budget Office (CBO) estimate that proposed Republican legislation associated with President Trump’s administration would result in roughly 11.8 million to 13.7 million Americans losing health insurance coverage over a decade due to cuts in Medicaid and restrictions in the Affordable Care Act marketplaces.pbs.orgpbs.orgWho would be affected by health care cuts in Senate version of Trump’s budget... These figures are projections based on legislative proposals rather than current facts.
The causal mechanism is that these legislative proposals include significant reductions in federal health care spending, particularly Medicaid funding cuts and changes to ACA subsidies, which would lead to millions becoming uninsured. This is a direct policy effect rather than an incidental correlation.
However, attributing this outcome directly to 'Trump voters' conflates voter behavior with legislative responsibility. While Republican lawmakers who support these policies are generally elected by Republican voters (including Trump supporters), it is the actions of elected officials and their policy decisions that cause these projected coverage losses. Voters themselves do not directly enact policy; they elect representatives who do.
Therefore, while it is accurate that policies supported by Trump and Congressional Republicans are projected to cause millions to lose coverage, framing it as 'Trump voters kicked 13 million people off health insurance' oversimplifies the causal chain and misattributes direct agency to voters rather than policymakers.
In summary, the core factual element about millions losing insurance due to Republican-led policy proposals linked to Trump is supported by credible evidence. The phrasing attributing this directly to 'Trump voters' is a rhetorical simplification rather than a precise causal statement.