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Bill Haas, John Messmer, Mark Osmack, Cort VanOstran

Democratic candidates for Missouri's Second District seat in the U.S. House of Representatives (from left) Bill Haas, John Messmer, Mark Osmack and Cort VanOstran.

Updated at 5:10 p.m. with fresh quotes from VanOstran campaign manager. 

WASHINGTON • Army veteran Mark Osmack has gotten his second endorsement from a sitting Democratic member of Congress, and fellow veteran, in his campaign to win his party's nomination for the seat currently held by Rep. Ann Wagner, R-Ballwin.

Rep. Tulsi Gabbard, D-Hawaii, endorsed Osmack for Missouri's 2nd Congressional District Tuesday, a week before the Missouri primaries. Earlier, Sen. Tammy Duckworth, D-Ill., endorsed Osmack, who received the Bronze Star after serving two Army tours in Afghanistan. 

Gabbard served in a medical field unit in Iraq and is a Major in the Hawaii National Guard. Duckworth lost both legs when a Black Hawk combat helicopter she was flying was shot down in Iraq in 2004. 

Other Osmack endorsees include the Missouri Fraternal Order of Police.

One of Osmack's primary opponents, Cort VanOstran, has not received any federal endorsements, but his campaign has piled up a series of local and state endorsees, and it is the only one with labor endorsements, his campaign spokeswoman pointed out. 

"We aren't focused on earning the endorsements of politicians in Washington," VanOstran campaign manager Claire Botnick said. "Our focus has been on earning the support of the people of this district." 

Wagner faces a multi-candidate field herself in next week's primaries, but she has a huge cash advantage over any potential opponent. As of July 18, she had nearly $3 million in her campaign account. Noga Sachs, a political novice who is challenging her in the GOP primary, had less than $6,000.

VanOstran has been the most prolific fundraiser on the Democratic side, and he had about $455,000 cash on hand as of July 18, according to the Federal Election Commission. Osmack had just under $40,000. 

Other primary candidates include Democrats John Messmer and 2008 Democratic nominee Bill Haas, each of whom showed less than $10,000 in campaign accounts as of their latest filings.

Haas, who has largely self-financed his campaign, complained that some endorsements, such as those from unions and abortion rights groups, went to VanOstran as the "establishment" candidate before the endorsers even talked to other candidates. 

"I expressed my displeasure to them in that unfair, unnecessary process in no uncertain but civil and respectful terms," Haas told the Post-Dispatch. 

In Missouri's 1st Congressional district, Rep. William Lacy Clay, D-St. Louis, had a 12-1 cash-on hand advantage over challenger Cori Bush, a nurse and pastor who recently hosted socialist democrat Alexandria Ocasio-Cortez for a rally in St. Louis. 

Clay showed more than $243,000 in his campaign account as of July 18, to about $20,000 for Bush. 

A third Democrat, DeMarco Kaureen Davidson, had less than $2,000 as of July 1. 

On Tuesday, Missouri voters will also choose nominees for the Senate seat currently held by Sen. Claire McCaskill, D-Mo., who is running for re-election.

Updated campaign finance records show McCaskill, who began running ads in the state in April, with about $6.65 million cash on hand. 

Attorney General Josh Hawley, the Republican front-runner, had about $2.3 million as of July 18. He ran his first ad at the beginning of July

His closest Republican rival, money-wise, as of July 18 filings, was ex-Air Force pilot Tony Monetti, with $32,000. The FEC as of Tuesday had not reported July 18 filings from Libertarian-turned-Republican Austin Petersen, who had roughly $38,000 on hand as of July 1. 

Courtland Sykes is also seeking the Republican nomination, and Angelica Earl the Democratic. 

Chuck Raasch is a reporter for the St. Louis Post-Dispatch.