SIOUX CITY | Jim Mowrer, the Democrat running to unseat U.S. Rep. Steve King, R-Kiron, has again won the quarterly fundraising battle between the two Iowa 4th congressional district candidates.

Federal Election Commission reports due Tuesday show Mowrer raised $351,107 for the fundraising period ended March 31, while King brought in $121,041.

Mowrer's campaign in a release said the fundraising result shows he has momentum, after bringing in more funds than King for all three fundraising quarters since Mowrer launched his campaign.

Mowrer's total for the most recent three-month period is nearly as much as the combined amount he raised in the prior two quarters, or six months, since launching his campaign in 2013.

Mowrer raised $181,514 in the months of July through September, and $175,362 for the months of October through December.

In the prior two quarters, Mowrer raised more than King. King raised $109,871 in the 2013 third quarter and $162,850 in the fourth quarter.

Over the three quarters since Mowrer became a candidate, he has raised a combined $707,983, while King has brought in $393,762.

In a release, Mowrer said, "For the third quarter in a row, our campaign has raised more money from more people in Iowa than Steve King. The message from the people of Iowa and across the nation is clear. They want leaders who will work together with both Democrats and Republicans -- not someone who seeks the media spotlight."

Mowrer is a military veteran living in Boone who is seeking elective office for the first time.

King's campaign continued the practice of not commenting on fundraising reports.

Also in the reports, Mowrer reported having $450,900 in campaign cash on hand after expenses at the end of the first quarter. That is up from his cash on hand of $206,368 at the end of the prior quarter.

King had $187,552 cash on hand at the end of the latest quarter, up from his $139,428 total as of Dec. 31.

The election will be held on Nov. 4. King was first elected in 2002.