McCaskill welcomes ninth grandson in a row
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Sen. Claire McCaskillClaire Conner McCaskillMcCaskill to oppose Kavanaugh nomination Wyden says foreign hackers targeted personal accounts of senators, staffers Election Countdown: Trump confident about midterms in Hill.TV interview | Kavanaugh controversy tests candidates | Sanders, Warren ponder if both can run | Super PACs spending big | Two states open general election voting Friday | Latest Senate polls MORE’s family is beefing up in the testosterone department — the Missouri Democrat is welcoming her ninth grandson in a row.

The 64-year-old lawmaker tweeted Tuesday that her family was expanding with another male addition:

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A McCaskill spokesman tells ITK the newest addition is named Samuel Patrick, and he weighed in at 7 lbs., 11 oz. when he was born at a St. Louis hospital. Samuel is McCaskill's son and his wife's third son.

February has proven to be a productive month for the McCaskill clan. Earlier this month, McCaskill welcomed her 10th grandchild overall.

McCaskill, considered one of the most vulnerable Democratic senators heading into November’s midterm elections, is a mother of three adult children. Several of her grandkids are the children of her husband Joseph Shepard's kids. 

—Updated at 5:39 p.m.