Any senator can block the nominations on the Senate floor — they can only be confirmed with unanimous support.
Sen. Ted CruzTed CruzOvernight Defense: Senators go to White House for North Korea briefing | Admiral takes 'hit' for aircraft carrier mixup | Lawmakers urged to beef up US missile defense Senators get North Korea briefing in unusual WH visit Overnight Tech: FCC chief unveils plan for net neutrality rollback | Tech on Trump's sweeping tax plan | Cruz looks to boost space industry MORE (R-Texas) has indicated he might block Wheeler's nomination unless he promised not to require more disclosure about the groups paying for political advertisements. Cruz's office did not respond to a request to comment Wednesday evening.
Wheeler is an investor and former lobbyist for the cellphone and cable industries. O'Rielly is a longtime congressional aide who currently works for Sen. John CornynJohn CornynThe Hill's 12:30 Report Overnight Defense: US moving missile defense system to South Korea | Dems want justification for Syria strike | Army pick pushes back against critics of LGBT record Disconnect: Trump, GOP not on same page MORE (R-Texas), and McSweeny is currently an attorney in the Justice Department's Antitrust Division.
—Updated at 6:51 p.m.