Sen. Marco RubioMarco Antonio RubioCheese, wine importers reeling from Trump trade fight Peace Corps' sudden decision to leave China stirs blowback Lawmakers raise concerns over Russia's growing influence in Venezuela MORE (R-Fla.) and the heads of the National Republican Senatorial Committee joined Sen. Rand PaulRandal (Rand) Howard PaulSenate braces for fight over impeachment whistleblower testimony Pelosi names first-ever House whistleblower ombudsman director The Hill's Morning Report — AG Barr, GOP senators try to rein Trump in MORE (R-Ky.) in his filibuster against confirming John Brennan to head the Central Intelligence Agency, a move that could have political benefits for all involved.

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Rubio has been carefully crafting one of the most conservative voting records in the Senate — one that closely mirrors Paul's.

Many have speculated that is partly aimed at ensuring there's no daylight between the two in case they both decide to run for president in 2016, giving Rubio equal claim to the Tea Party mantle. 

It also gives the Florida Republican another line of attack on President Obama — this time on foreign policy, an area he's increasingly focused on since he joined the Senate Foreign Relations Committee.

The involvement of Sen. Ted CruzRafael (Ted) Edward CruzTed Cruz takes aim at Alabama vasectomy bill: 'Yikes' 'Medicare for All' will turn into health care for none Cruz 'impresses' his daughter with Chris Evans meeting MORE (R-Texas) in the filibuster, and later of NRSC Chairman Jerry MoranGerald (Jerry) MoranThe Hill's Morning Report — AG Barr, GOP senators try to rein Trump in Overnight Defense: Senate votes to rein in Trump war powers on Iran | Pentagon shifting .8B to border wall | US, Taliban negotiate seven-day 'reduction in violence' The 8 Republicans who voted to curb Trump's Iran war powers MORE (R-Kansas), gives the two another chance to attack Obama as well. It also allows Moran to bolster his conservative credentials. Cruz serves as vice chairman of the NRSC, along with Sen. Rob PortmanRobert (Rob) Jones PortmanGOP senators offering bill to cement business provision in Trump tax law Mnuchin defends Treasury regulations on GOP tax law Bipartisan lawmakers introduce bill to combat cyberattacks on state and local governments MORE (R-Ohio).

Cruz is no surprise. He has a strong constitutionalist Tea Party streak, and he was the second to join Paul, after fellow Tea Party Sen. Mike LeeMichael (Mike) Shumway LeeThe Hill's Morning Report — AG Barr, GOP senators try to rein Trump in Overnight Defense: Senate votes to rein in Trump war powers on Iran | Pentagon shifting .8B to border wall | US, Taliban negotiate seven-day 'reduction in violence' The 8 Republicans who voted to curb Trump's Iran war powers MORE (R-Utah).  But Moran, who is viewed as more of an establishment conservative, needs to build trust with the Tea Party as he tries to guide the NRSC's involvement in potentially contentious primaries.

Tea Party groups are already rallying to the cause. The conservative group FreedomWorks issued a statement Wednesday afternoon calling for other senators to "Stand with Rand."

The NRSC also tweeted support of the filibuster, asking followers to "stand with us.

Paul is fighting the nomination because of Brennan's hand in the drone program and the Obama administration's refusal to completely rule out drone strikes on U.S. civilians on American soil. The fight has inflamed civil libertarians in both parties, including elements of the Tea Party.

Paul promised during the filibuster to continue it for "as long as it takes, until the alarm is sounded from coast to coast that our Constitution is important, that your rights to trial by jury are precious, that no American should be killed by a drone on American soil without first being charged with a crime, without first being found to be guilty by a court."


The support of other Republicans has the potential to boost Paul's political standing. 

One of his biggest political hurdles, should he run for the presidency, is appealing to mainstream conservatives wary of his libertarian foreign policy streak. The backing of his Senate Tea Party compatriots (and others) on this high-profile filibuster could help him do just that.

Others involved, like Lee, Sen. Pat Toomey (R-Pa.) and retiring Sen. Saxby ChamblissClarence (Saxby) Saxby ChamblissThe Hill's Morning Report - Gillibrand drops out as number of debaters shrinks Hoekstra emerges as favorite for top intelligence post Republicans say Democrats holding up disaster relief as 'Sandy payback' MORE (R-Ga.), and Sen. Ron WydenRonald (Ron) Lee WydenDemocrats demand Trump administration withdraw religious provider rule Ernst endorses bipartisan Grassley-Wyden bill to lower drug prices Senate Dems blast Barr for 'clear violation' of duty in Stone case, urge him to resign MORE (D-Ore.), the lone Democrat involved, seem to have little obvious political motivation for joining Paul. 

Toomey is another Tea Party favorite, while Wyden has been a strong critic of the drone program that Brennan has helped develop.