Morrison, the conservative Democrat who received a surprising 13 percent of the vote in the 2010 U.S. Senate race despite little name recognition or money, faces state Sen. Gene Jeffress, of Louann, and Hot Springs attorney Q. Byrum Hurst in the Democratic primary.
Cowart, a U.S. Marine and police officer, faces Tom Cotton, of Dardanelle, and Beth Anne Rankin, of Magnolia in the Republican primary.
U.S. Rep. Mike Ross, a Democrat, previously announced he would not seek re-election, and Republican Marcus Richmond has dropped out of the race.
Morrison and Cowart will speak to the Southeast Arkansas TEA Party about their platform and answer questions. The meeting is Monday at 6:30 p.m. at the Living Word Fellowship on U.S. 425 South in Monticello, across the highway from the Ryburn Auto Dealership.
The meeting is open to the public.
The Southeast Arkansas TEA Party invites candidates, regardless of their party affiliation, to speak at their monthly meetings.