Actor Bradley Whitford on Tuesday said that Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonWatergate’s John Dean: Nixon would tell Trump 'he's going too far' Senate Homeland Security chairman requests briefing on Ivanka Trump emails House GOP to hold hearing into DOJ’s probe of Clinton Foundation MORE is the strongest White House hopeful he has ever seen.

“With me, it comes down to a very simple case of Hillary being by far the most qualified candidate to run for president in my lifetime,” he told host Steve Kornacki on MSNBC.

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“Hillary has been a champion in the progressive arena my entire adult life,” “The West Wing” star said. "She has been at the forefront of protecting our most vulnerable citizens [by] fighting for healthcare.

“I think she’s the most prepared person by far, and I support her enthusiastically,” added Whitford, who portrayed White House Deputy Chief of Staff Josh Lyman on the political drama.

Whitford also urged Wisconsin voters should back Clinton over rival Bernie SandersBernard (Bernie) SandersOvernight Health Care: Drug industry nervous about Grassley | CDC warns public not to eat romaine lettuce | Sanders unveils new drug pricing bill Sanders and Khanna have a plan to lower your drug prices 2020 Democrats challenge Trump's use of troops at Mexico border MORE in Tuesday’s Democratic presidential primary.

“In Wisconsin, I don’t think a lot of people understand that Hillary out-Bernied Bernie her entire life in terms of pushing the progressive agenda,” said Whitford, a Badger State native.

“Idealism is more than just talking about it,” he added. "Idealism is knowing what you can actually get done and getting it done.”

Whitford also dismissed claims that Democratic voters are unenthusiastic about Clinton’s campaign.

“I think it’s very easy on the left to fall in love with someone who doesn’t have perhaps as dirty a uniform [or] has been as battle-tested as Hilary has,” he said.

Whitford added that President Jed Bartlet, the Democratic chief executive on “The West Wing,” would readily vote for Clinton.

“There’s no doubt in my mind that Hillary would be President Bartlet’s choice,” he said of the character portrayed by actor Martin Sheen. "Nobody is more prepared to take that position on day one."