Capitol Hill Police are now shadowing some Republican senators who have been targeted by activists opposed to Supreme Court nominee Brett Kavanaugh.

Judiciary Committee Chairman Chuck Grassley, R-Iowa, and Sens. Susan Collins of Maine, Jeff Flake of Arizona, and John Kennedy of Louisiana are among the lawmakers whose offices have been swarmed by protesters who want the Senate to block Kavanaugh from the high court, and who have been helped through the Senate offices by police.

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Kennedy is a member of the Senate Judiciary Committee, and Collins is a key swing vote who is undecided on Kavanaugh.

“I think it’s worse for Judiciary Committee members, but I know Sen. Collins is having a lot of trouble,” Kennedy said Wednesday. “She can hardly leave her home. There has been an increase in people screaming at you.”

Sen. Bob Corker, R-Tenn., said police also briefed senators about what they're doing to make the Capitol safer.

"Today in our caucus, we had a presentation by the Capitol Police where they shared what they are doing to change the way security is here," he said. "We had about five or six individuals come in, talk with us about the change in policies that are taking place.”

[Related: Rand Paul's wife: 'I now keep a loaded gun by my bed' after activists threatened family]

A final vote on his nomination is expected this week after senators receive a supplemental FBI report on two accusations of sexual misconduct that have been leveled against Kavanaugh and which he denies.

Activists opposed to Kavanaugh closed in on Republican lawmakers arriving in town Monday at Reagan National Airport. They targeted Senate Majority Leader Mitch Mcconnell, R-Ky., David Perdue, R-Ga., and Bob Corker, R-Tenn.

Corker stopped to talk to the group. He said they mischaracterized the GOP as a party that does not care about the problem of sexual assault.

Last month, shouting activists forced Sen. Ted Cruz, R-Texas, and his wife to temporarily abandon a D.C. restaurant although they later went back in and had dinner.

McConnell brought up the issue of activists and security in a closed-door GOP meeting on Wednesday, Corker said.

He raised the issue in a Wednesday morning floor speech.

“I want to make it clear to these people who are chasing my members around the halls here, or harassing them at the airports, or going to their homes,” McConnell said. “We are not going to be intimidated by these people. There is no chance in the world they are going to scare us out of doing our duty. I don’t care how many members they chase, how many members they harass here in the halls. We will not be intimidated by these people.”

Al Weaver contributed