Former Vice President Mike Pence filed paperwork with the Federal Election Commission Monday to launch his presidential campaign.The paperwork marks the start of a long-anticipated 2024 bid for Pence, which will put him in the middle of a crowded GOP primary field that also features Donald Trump, the former president Pence served under, and Florida Gov. Ron DeSantis, considered by most to be Trump's most serious Republican challenger.

Pence has long teased that he could enter the 2024 field, and in hints that a campaign is coming, has been traveling to key early primary states and had a super PAC set up by allies that will likely support his campaign as it gets off the ground.

Pence is anticipated to have an official campaign launch on Wednesday in Des Moines, Iowa, followed by a CNN town hall later that night.

This is a developing story. Please check back for updates.