RepublicanRunning for LA U.S. Senate · 2026
Mark Spencer
Mark Spencer ( Republican Party ) ran for election to the U.S. Senate to represent Louisiana. Spencer lost in the Republican primary on May 16, 2026 .
In brief
AI · verified vs data · 2026-07-03
Mark Spencer, a Republican, ran for election to the U.S. Senate to represent Louisiana in 2026. Spencer was not an incumbent candidate in this race. He participated in the Republican primary election held on May 16, 2026, but did not prevail in that primary contest.
Governing & voting record
—
No legislative record
Roll-call votes and sponsored bills are collected for members of Congress from congress.gov. There is no roll-call source for this office yet.
Where they stand
—
Key positions not yet compiled
Positions are drawn from the candidate's public record and statements. We haven't compiled a verified set for this candidate yet.
How they vote
—
No party-unity or ideology scores
Party-unity and DW-NOMINATE ideology scores are only available for candidates with a congressional roll-call record.
Ratings from advocacy groups
—
No advocacy-group ratings
Interest-group scorecards have no machine-readable feed — they're curated per candidate, and none are on file yet.
Career & history
—
No career timeline
Career history is built from Wikipedia / Wikidata records. No matching public record was found for this candidate.
Public favorability
—
No favorability data
This candidate isn't tracked by YouGov's public-figure panel, and no published state polling on their favorability was found.
Donors & money
—
No campaign finance on file
FEC filings appear here once the candidate's committee reports. Early-cycle and self-funding candidates often have nothing on record yet.
Related prediction markets
All markets →Live contract prices tied to Spencer and the seat. Prices are ¢-per-share of the YES outcome; context only, never merged into our polling averages.
Will the Democrats win the Louisiana Senate race in 2026?
Polymarket · Democrat
Will the Republicans win the Louisiana Senate race in 2026?
Polymarket · Republican
Which party will win the 2026 US Senate election in Louisiana?
predictit · Republican Party
Which party will win the 2026 US Senate election in Louisiana?
predictit · Democratic Party
Kentucky Senate winner?
Kalshi · vol $1k · Andy Barr
Kentucky Senate winner?
Kalshi · vol $1 · Charles Booker
Sources & provenance
Markets
Live venues
Polymarket · Kalshi
ALL FIGURES DRAWN FROM PUBLICLY AVAILABLE RECORDS · CANDIDATE PROFILES ARE NONPARTISAN AND CARRY NO ENDORSEMENT.
Related coverage
wwno.org · 2026-06-28
Letlow, Davis advance in Louisiana’s U.S. Senate race
fox8live.com · 2026-06-27
Polls open for Louisiana runoff election | Everything you need to know
thehill.com · 2026-06-26
Live results: Letlow, Fleming duke it out in Louisiana Senate runoff after Cassidy primary ouster
nbcnews.com · 2026-06-26
Louisiana Senate Primary Runoff Election 2026 Live Results
Republican · LA U.S. Senate
Mark Spencer
Mark Spencer ( Republican Party ) ran for election to the U.S. Senate to represent Louisiana. Spencer lost in the Republican primary on May 16, 2026 .
In brief
AI · verified vs data · 2026-07-03Mark Spencer, a Republican, ran for election to the U.S. Senate to represent Louisiana in 2026. Spencer was not an incumbent candidate in this race. He participated in the Republican primary election held on May 16, 2026, but did not prevail in that primary contest.
Governing & voting record
—
No legislative record
Roll-call votes and sponsored bills are collected for members of Congress from congress.gov. There is no roll-call source for this office yet.
Where they stand
—
Key positions not yet compiled
Positions are drawn from the candidate's public record and statements. We haven't compiled a verified set for this candidate yet.
Career & history
—
No career timeline
Career history is built from Wikipedia / Wikidata records. No matching public record was found for this candidate.
Public favorability
—
No favorability data
This candidate isn't tracked by YouGov's public-figure panel, and no published state polling on their favorability was found.
How they vote
—
No party-unity or ideology scores
Party-unity and DW-NOMINATE ideology scores are only available for candidates with a congressional roll-call record.
Ratings from advocacy groups
—
No advocacy-group ratings
Interest-group scorecards have no machine-readable feed — they're curated per candidate, and none are on file yet.
Donors & money
—
No campaign finance on file
FEC filings appear here once the candidate's committee reports. Early-cycle and self-funding candidates often have nothing on record yet.
Related prediction markets
All markets →Will the Democrats win the Louisiana Senate race in 2026?
Polymarket · Democrat
Will the Republicans win the Louisiana Senate race in 2026?
Polymarket · Republican
Which party will win the 2026 US Senate election in Louisiana?
predictit · Republican Party
Which party will win the 2026 US Senate election in Louisiana?
predictit · Democratic Party
Kentucky Senate winner?
Kalshi · vol $1k · Andy Barr
Kentucky Senate winner?
Kalshi · vol $1 · Charles Booker
Sources & provenance
Markets
Live venues
Polymarket · Kalshi
ALL FIGURES DRAWN FROM PUBLICLY AVAILABLE RECORDS · CANDIDATE PROFILES ARE NONPARTISAN AND CARRY NO ENDORSEMENT.