EghtesadOnline: Republican U.S. senators John McCain and Marco Rubio won their party's nominations on Tuesday to seek re-election in Arizona and Florida in November, as both of the high profile politicians saw off insurgent challengers.

EghtesadOnline: Saudi Arabia doesn’t have the same clout it used to. That’s the message the chairman of the U.S. Senate Foreign Relations Committee says he has delivered to the Saudi government.

EghtesadOnline: The U.S. Senate will vote on Wednesday on a measure to block the sale of tanks and other military equipment worth $1.15 billion to Saudi Arabia, but the measure is not expected to pass despite lawmakers' growing frustration with the longtime U.S. ally.

EghtesadOnline: The U.S. Senate 's permanent subcommittee on investigations will probe Mylan Pharmaceuticals' pricing of the allergy auto-injector EpiPen, according to a press release issued on Wednesday.

EghtesadOnline: Republican voters in Arizona and Florida are expected to pick Senators John McCain and Marco Rubio as their respective U.S. Senate nominees when they go to the polls on Tuesday, but one name not on either ballot, Donald Trump, looms large.