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Mark Baisley OppScore Rating: +3.68

Mark Baisley is a Republican State Senate representative for Colorado district 4 and holds an OppScore of +3.68. OppScore is a nonpartisan political rating system that scores politicians from -5.00 to +5.00 across the Five Points of Opportunity, using published voting records and public disclosures.

Mark Baisley is a Republican state senator from Colorado's 4th district, serving since 2023 after two terms in the House. A former aerospace engineer with NASA, Raytheon, and other defense firms, he now leads an engineering software company and is the 2026 Republican nominee for U.S. Senate. He stands out for advancing conservative priorities and passing multiple bills in a Democratic supermajority legislature.

Mark Baisley rating summary

• Party: Republican
• Office: State Senate
• State: Colorado
• District: 4
• OppScore: +3.68 on a -5.00 to +5.00 scale
• Score basis: Record based, documented on 28 of 44 scored questions

What is on this profile

• Five Points of Opportunity score breakdown
• Voting record and legislative history
• Campaign finance and donor disclosures
• Dirt Alerts and accountability reporting
• Score trend over time

Primary sources

• Official website
• Ballotpedia profile

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