Former Rep. Rob Portman (R), just hours into his campaign for Senate, is already picking up support from his fellow Ohio Republicans.

House Minority Leader John BoehnerJohn BoehnerLobbying World 'Ready for Michelle' PACs urge 2020 run News Flash: Trump was never going to lock Clinton up MORE and Rep. Bob Latta endorsed Portman on Wednesday. Portman, the former White House budget director and U.S. trade representative, became the first candidate to announce a bid for Sen. George Voinovich's (R) seat on Wednesday morning.

Boehner called Portman the "strongest candidate" to represent Ohio in the Senate. Boehner also stressed Portman's fiscal conservative bona fides.

"Rob is a capable and principled reformer, well-liked throughout the Buckeye State and well-known for his commitment to policies that help create new jobs," Boehner said in a statement. "With Congressional Democrats plotting to increase government spending to unprecedented levels, America will need an experienced public servant like Ohio