Corey Lewandowski says he won't run for U.S. Senate in 2020.
President Trump's former campaign manager announced his decision today on Twitter.
The conservative Republican had waged a high-profile exploratory campaign against Senator Jeanne Shaheen, a Democrat seeking her third term in 2020.
New Hampshire's senior senator pointed to Lewandowski's possible candidacy to help raise funds for her re-election bid.
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