The nomination of U.S. Rep. Roger Marshall to run as Kansas’ Republican candidate for U.S. Senate bolsters that party’s hopes that it can hold on to the seat in November.


After garnering 40% of votes cast in Tuesday’s Kansas Republican primary, Marshall beat out challenger Kris Kobach for the nomination. Marshall will face Democrat Barbara Bollier in the November general election as they vie for the U.S. Senate seat held by retiring Republican Sen. Pat Roberts.


Marshall and Bollier are both physicians by profession. Marshall currently represents Kansas’ 1st Congressional District in the U.S. House, while Bollier represents District 7 in the Kansas State Senate.


Kansas hasn’t elected a Democrat to the U.S. Senate since 1932. Leading up to Tuesday’s primary, many Republicans were concerned a Kobach win would lead to a Democratic victory in November.


According to data from the Center for Responsive Politics, Bollier has a substantial fundraising lead over Marshall, which could place her on solid footing leading up to the general election. Bollier has raised about $7.8 million, compared to Marshall’s roughly $2.7 million.


According to the Kansas Secretary of State’s Office, Marshall amassed 40% — or more than 158,000 — of votes cast in Tuesday’s Kansas Republican primary. Kobach was second, with 26% of primary votes, followed by Bob Hamilton with 19%.


The Republican primary field began with 11 candidates. It quickly narrowed to a three-man race early on election night, as Marshall, Kobach and Hamilton pulled ahead of the pack.


As precincts continued reporting results, the race narrowed further, with Marshall and Kobach distancing themselves from Hamilton. Marshall consistently led Kobach by at least 10 percentage points as results rolled in.


The Associated Press called the race shortly after 9 p.m. Tuesday, declaring Marshall the winner.


In a video Marshall posted to Twitter late Tuesday, he took a call from President Donald Trump, who offered his congratulations on the win.


"Roger, that’s an incredible race," Trump said. "Now we have to win the one on Nov. 3."


Trump declined to endorse Marshall or Kobach in the primary.


Throughout the night Tuesday, Bollier held a commanding lead over rival Robert Leon Tillman. She ended the night with 86% of votes cast in the Kansas Democratic primary.


In a tweet Tuesday night Bollier wrote, "Thank you, Kansas! I’m so excited to accept the Democratic nomination for U.S. Senate — and for the opportunity to become the first woman physician elected there."


Tuesday’s primary was also marked by an increase in advance voting numbers.


The Kansas Secretary of State’s Office reports that more than 315,000 advance ballots had been mailed to registered voters in the state ahead of the primary. More than 232,800 of those advance ballots were returned by mail as of Wednesday, and another 50,523 advance ballots had been cast in person.


For comparison, the state mailed 54,302 advance ballots in 2016 and 51,455 advance ballots in 2018.


Advance ballots mailed to voters must be received by county election offices by close of business day Friday, so some ballots may continue to trickle in. However, those ballots must have been postmarked on or before election day to count toward primary results.