Republican presidential nominee Donald Trump will select Indiana Gov. Mike Pence as his vice presidential running mate, according to Washington, D.C. paper Roll Call.

Pence, 57, is a steady, staunch conservative who will help calm nervous establishment Republican that remain wary of Trump.

He also could be a big help for Trump in Midwestern swing states.

Pence served six terms in Congress before becoming Indiana governor. According to The Associated Press, Pence also has deep ties to evangelical Christians and other conservatives, particularly after signing a law last year that critics said would have allowed businesses to deny service to gay people for religious reasons.

Trump took notice of Pence during the Indiana primary, noting that the governor had high praise for him despite initially endorsing one of his rivals, Texas Sen. Ted Cruz.

Trump will reportedly appear with Pence tomorrow in Manhattan.

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