Rand Paul is the only Republican senator to block a new bipartisan aid package to help Ukraine's ongoing war with Russia.
Recent polls show a near tie between Barnette and former President Donald Trump's preferred candidate.
Dozens of congressional Republicans have repeatedly voted against funding for Ukrainian assistance.
The Alaskan Republican previously beat the odds to win reelection as a write-in candidate in 2010.
Paul defended his decision to block a fast-tracked vote on Ukraine aid and warned about "fiscal insanity."
The Republican senator said he had taken an oath to the U.S. Constitution, and not to "any foreign nation."
An ad from the group Really American PAC says that Mehmet Oz can "not be trusted to faithfully represent the United States and the Constitution."
These are the eight women among the senators who voted against enshrining abortion rights in federal law, thus superseding any state legislation.
Biden criticized Senate Republicans for voting against the bill, but he did not extend that criticism to Democratic Senator Joe Manchin, who voted with the GOP.
The Democratic senator joined his GOP counterparts in voting against a bill codifying the right to an abortion under federal law.
A bill to protect abortion rights across the U.S. failed in the U.S. Senate Wednesday. Live updates have ended.
The vote to codify the 1973 ruling is widely considered certain to fail, but Democrats are hoping it will mobilize voters in November.
Police attended Senator Susan Collins' Maine home after a pro-abortion message appeared on the sidewalk.
Republican U.S. Senator Steve Daines of Montana compared human women to sea turtles while arguing against a bill to codify Roe v. Wade on Tuesday.
Two Senate Democrats have indicated they would possibly cut a deal with Republicans regarding White House plans to rescind Title 42 immigration restrictions.
Leaders have pointed to the generals' deaths as evidence of the Russian military's incompetence.
But the two officials told the Senate Committee on Armed Services that they believe China is still planning an eventual takeover of Taiwan.
"It looks like to me that we're taking way too many chances of sending people over there for a photo op," Senator Tommy Tuberville said regarding Ukraine.
"This week's vote is not an abstract exercise; this is as real and as high stakes as it gets," Senate Majority Leader Chuck Schumer said.
Many conservative states already have "trigger laws" in place that would ban abortions immediately or soon after if the Supreme Court overturns Roe v. Wade.
Although Republicans overall look to be favored to take back power, recent polls show mixed results.
Trump said Friday at a Pennsylvania rally that the U.S. Senate candidate's wife will make a "great first lady."
The former president praised the GOP Senate candidate for being "in the bedrooms of all those women telling them good and bad."
The president appeared to lament the partisan divisions in the modern Senate during remarks in Ohio.
Frustrated Republicans are calling Trump's Senate pick a "RINO' and urging voters to cast their ballot for a more conservative candidate.
"The Trump era is over in Pennsylvania because of his endorsement of Dr. Oz," a county GOP chair said recently.
Senate Minority Leader Mitch McConnell, playing off of a nickname the former president had given him, gave fellow senators a bottle of Old Crow bourbon.
"It's hard to imagine anything that would derail his support," said the Republican senator, a staunch Trump critic.
The Vermont senator argued the multi-billion dollar contract for an alternative moon landing rocket was a "bailout" for Jeff Bezos' "space hobby."
"Those voters are going to be Tim Ryan voters," the Democratic congressman said as he prepares to face off against Trump-backed J.D. Vance in November.